1^n + 3^n + 9^n.
3, 13, 91, 757, 6643, 59293, 532171, 4785157, 43053283, 387440173, 3486843451
1 seqfan posts
Tue Feb 10 17:40:26 CET 2009 [seqfan] A001576
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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