Number of permutations of 1..n avoiding adjacent step pattern up, down, down.
1, 2, 6, 21, 90, 450, 2619, 17334, 129114, 1067661, 9713682, 96393726
4 seqfan posts
Sun May 16 17:09:31 CEST 2010 [seqfan] Re: Primes embedded
Fri May 14 14:29:43 CEST 2010 [seqfan] Re: Duplicates? A177729 A177517 A177516
Fri May 14 13:30:09 CEST 2010 [seqfan] Re: Duplicates? A177729 A177517 A177516
Fri May 14 12:40:31 CEST 2010 [seqfan] Duplicates? A177729 A177517 A177516
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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