Subdiagonal of triangle A171871: Classifications of N elements containing exactly N-2 binary partitions.
0, 0, 1, 3, 17, 74, 358, 1631, 7563, 34751, 16080
2 seqfan posts
Sat Jan 16 20:28:11 CET 2010 [seqfan] Some more new sequences
Mon Jan 11 05:06:02 CET 2010 [seqfan] A005646 now extended to 12 terms.
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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