208 (number) explained

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]}

Notes and References

1. Practical numbers.
2. Tetranacci numbers.
3. .
4. Rhombic matchstick numbers.
5. T is the first, fourth, eleventh, ... letter in this sentence, not counting spaces or commas (Aronson's sequence).
6. Number of n-bead necklaces with 4 colors.
7. Generalized weak orders on n points.
8. .