A179342 Number of permutations of 1..n with i-6 <= p(i) <= i+4.

1, 2, 6, 24, 120, 600, 3000, 13464, 57054, 237686, 999391, 4306681, 18754444, 81835060, 356291064, 1546071744, 6694132224, 28956429504, 125298890496, 542568128860, 2350692002012, 10186450826689, 44138179339513

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n=1..400

Crossrefs

Sequence in context: A293775 A228399 A179340 * A179346 A179351 A179357

Adjacent sequences: A179339 A179340 A179341 * A179343 A179344 A179345

Keyword

nonn

Author

R. H. Hardin, Jul 11 2010

Status

approved