Triangular numbers that are half other triangular numbers.
0, 3, 105, 3570, 121278, 4119885, 139954815, 4754343828, 161507735340
5 seqfan posts
Fri Jun 24 08:36:06 CEST 2011 [seqfan] Re: three triangular numbers in a row
Fri Jun 24 08:31:20 CEST 2011 [seqfan] Re: three triangular numbers in a row
Fri Jun 24 06:35:59 CEST 2011 [seqfan] Re: three triangular numbers in a row
Fri Jun 24 06:34:52 CEST 2011 [seqfan] Re: three triangular numbers in a row
Fri Jun 24 05:58:37 CEST 2011 [seqfan] three triangular numbers in a row
Index of A-numbers in seqfan: by ascending order
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