Triangle sequence of:t(n,k)=A059481(n,k)*(A059481(n,k)-1)/2
0, 1, 3, 3, 15, 45, 6, 45, 190, 595, 10, 105, 595, 2415, 7875, 15, 210, 1540, 7875
2 seqfan posts
Sun Jun 13 08:51:05 CEST 2010 [seqfan] Re: (3^n+1)/2 is prime, A171381
Sun Jun 13 07:24:58 CEST 2010 [seqfan] (3^n+1)/2 is prime, A171381
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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