A202693 The second of three triangles counting 3-colored alternating permutations by their last value.

1, 1, 2, 8, 7, 5, 26, 34, 41, 46, 352, 326, 292, 251, 205

Offset

1,3

Links

Table of n, a(n) for n=1..15.

M. Josuat-Verges, J.-C. Novelli and J.-Y. Thibon, The algebraic combinatorics of snakes, arXiv preprint arXiv:1110.5272 [math.CO], 2011.

Example

Triangle begins:
1
1 2
8 7 5
26 34 41 46
352 326 292 251 205
...

Crossrefs

See A202692 for further information.

Cf. A202694.

Sequence in context: A051429 A268308 A027606 * A174552 A083679 A213930

Adjacent sequences: A202690 A202691 A202692 * A202694 A202695 A202696

Keyword

nonn,tabl,more

Author

N. J. A. Sloane, Dec 23 2011

Status

approved