A322251 Number of permutations of [n] in which the length of every increasing run is 0 or 1 (mod 3).

1, 1, 1, 2, 8, 32, 132, 702, 4566, 31670, 237446, 2010626, 18782106, 187594266, 2009039346, 23200862726, 286250968646, 3740867774726, 51734894498790, 756345994706634, 11641318110171330, 188004200777993570, 3180713596572408650, 56276908859288339822

Offset

0,4

Links

Alois P. Heinz, Table of n, a(n) for n = 0..470

Crossrefs

Cf. A317111, A322262.

Sequence in context: A228921 A150829 A155084 * A150830 A150831 A084607

Adjacent sequences: A322248 A322249 A322250 * A322252 A322253 A322254

Keyword

nonn

Author

Alois P. Heinz, Nov 30 2018

Status

approved