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Search: id:A001409
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| A001409 |
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Number of 2n-step polygons on cubic lattice. (Formerly M3095 N1254)
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+0 1
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| 1, 0, 3, 22, 207, 2412, 31754, 452640, 6840774, 108088232, 1768560270, 29764630632, 512705615350, 9005206632672, 160810554015408, 2912940755956084, 53424552150523386
(list; graph; listen)
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