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Three hundred sixty-nine is the natural number following three hundred sixty-eight and preceding three hundred seventy.
In mathematics
369 is the magic constant of the 9 × 9 magic square[1][2] and the n-Queens Problem for n = 9.[2]
There are 369 free octominoes (polyominoes of order 8).[3][4]
References
- ^ Kraitchik, M (1942). "Magic Squares". Mathematical Recreations. New York: Norton. pp. 142–192.
- ^ a b Sequence A006003 in OEIS.
- ^ Redelmeier, D. Hugh (1981). "Counting polyominoes: yet another attack". Discrete Mathematics. 36 (2): 191–203. doi:10.1016/0012-365X(81)90237-5.
- ^ Sequence A000105 in OEIS.
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