A151654 Number of permutations of 6 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.

0, 36, 4050864, 10490842656, 10255094095176, 6781036059518868, 3744571580295610680, 1893138497272086513120, 915533370856221482817936, 432873619819347725868506292, 202329942824085294375700974144, 94022530911932061378520715448384, 43564340849890810938403538912669496

Offset: 1

Author

R. H. Hardin, May 29 2009

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..200
• Index entries for linear recurrences with constant coefficients, signature (1287, -665085, 185049017, -31190554872, 3393504308298, -247577707116706, 12409594294661298, -434237280286221153, 10713236096664371179, -187333202983969901817, 2326256453936078033349, -20501775776012012073494, 127726669837663368160500, -557839835867479081817208, 1687107017150888313396640, -3485094134205352534911360, 4853917967549146311707136, -4463498883906046248413184, 2592626135894429309853696, -861342430920194620293120, 124750055827809622425600).

Crossrefs

Column k=5 of A237252.

Extensions

Terms a(7) and beyond from Andrew Howroyd, May 06 2020