208 (number)

← 207 208 209 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred eight
Ordinal	208th (two hundred and eighth)
Factorization	2^4× 13
Roman numeral	CCVIII
Binary	110100002
Ternary	212013
Quaternary	31004
Quinary	13135
Senary	5446
Octal	3208
Duodecimal	15412
Hexadecimal	D016
Vigesimal	A820
Base 36	5S36

208 (two hundred [and] eight) is the natural number following 207 and preceding 209.

208 is a practical number,^[1] a tetranacci number,^[2][3] a rhombic matchstick number,^[4] a happy number, and a member of Aronson's sequence.^[5] There are exactly 208 five-bead necklaces drawn from a set of beads with four colors,^[6] and 208 generalized weak orders on three labeled points.^[7][8]

References

1. "Sloane's A005153 : Practical numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. "Sloane's A000078 : Tetranacci numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. Waddill, Marcellus E. (1992), "The Tetranacci sequence and generalizations" (PDF), The Fibonacci Quarterly 30 (1): 9–20, MR 1146535.
4. "Sloane's A045944 : Rhombic matchstick numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
5. "Sloane's A005224 : T is the first, fourth, eleventh, ... letter in this sentence, not counting spaces or commas (Aronson's sequence)", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
6. "Sloane's A001868 : Number of n-bead necklaces with 4 colors", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
7. "Sloane's A004121 : Generalized weak orders on n points", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
8. Wagner, Carl G. (1982), "Enumeration of generalized weak orders", Archiv der Mathematik 39 (2): 147–152, doi:10.1007/BF01899195, MR 675654.