References to A056115

a(n)=n*(n+11)/2.
0, 6, 13, 21, 30, 40, 51, 63, 76, 90, 105, 121, 138, 156, 175, 195, 216, 238, 261, 285

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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