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

0,4

Links

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

Formula

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

Crossrefs

Column k=3 of A269129.

Cf. A014606, A047910.

Sequence in context: A210885 A364009 A093237 * A268751 A369663 A249550

Adjacent sequences: A269110 A269111 A269112 * A269114 A269115 A269116

Keyword

nonn

Author

Alois P. Heinz, Feb 19 2016

Status

approved