Oblong (or promic, pronic, or heteromecic) numbers: n(n+1).
0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380
4 seqfan posts
Mon Jun 7 16:43:30 CEST 2010 [seqfan] Re: A060798 Difference between upper and lower central divisors of n is 1
Thu Mar 11 14:26:02 CET 2010 [seqfan] Re: more strangeness (A000079 "Powers of 2" and many others)
Thu Mar 4 12:11:26 CET 2010 [seqfan] more strangeness (A000079 "Powers of 2" and many others)
Thu Aug 13 22:36:32 CEST 2009 [seqfan] Re: Rant on Maple code
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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