Number of permutations satisfying i-4<=p(i)<=i+4, i=1..n (permutations of length n within distance 4).
1, 2, 6, 24, 120, 504, 1902, 6902, 25231, 95401, 365116, 1396948, 5316192
4 seqfan posts
Wed Jun 30 13:07:48 CEST 2010 [seqfan] Re: b-files for apparently matching sequences?
Wed Jun 30 10:34:44 CEST 2010 [seqfan] Re: b-files for apparently matching sequences?
Tue Jun 29 18:08:01 CEST 2010 [seqfan] Re: b-files for apparently matching sequences?
Tue Jun 29 17:22:49 CEST 2010 [seqfan] b-files for apparently matching sequences?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.