References to A056121

n*(n+15)/2.
0, 8, 17, 27, 38, 50, 63, 77, 92, 108, 125, 143, 162, 182, 203, 225, 248, 272, 297, 323

1 seqfan posts

Fri Mar 12 10:09:44 CET 2010    [seqfan] editing A000217 Triangular numbers (long message)
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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