A269113 Number of sequences with 3 copies each of 1,2,...,n avoiding the pattern 12...n.

0, 0, 1, 374, 173891, 117392909, 117108036719, 171248808285596, 360953073372968159, 1072323973643442736211, 4376906243609822466600689, 23919710914189027455648239834, 170865299381465355439286870245691, 1561721420156259852074018974532765369

Offset: 0

Author

Alois P. Heinz, Feb 19 2016

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..165

Crossrefs

Column k=3 of A269129.

Cf. A014606, A047910.

Formula

a(n) = A014606(n) - A047910(n).