

A308595


a(n) is the number of pentagonal polyiamonds of all orders less than or equal to n.


2



0, 0, 0, 0, 1, 2, 5, 6, 8, 10, 13, 16, 21, 25, 28, 31, 39, 42, 48, 54, 61, 66, 73, 79, 88, 93, 98, 110, 120, 125, 136, 144, 157, 166, 172, 181, 195, 201, 211, 224, 242, 248, 258, 274, 286, 298, 309, 320, 341, 348, 359, 379, 393, 403, 416, 433, 455, 466, 478, 495
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