A202693 - OEIS

%I #17 Jun 04 2020 01:53:52

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

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

%H M. Josuat-Verges, J.-C. Novelli and J.-Y. Thibon, <a href="http://arxiv.org/abs/1110.5272">The algebraic combinatorics of snakes</a>, arXiv preprint arXiv:1110.5272 [math.CO], 2011.

%e Triangle begins:

%e 1

%e 1 2

%e 8 7 5

%e 26 34 41 46

%e 352 326 292 251 205

%e ...

%Y See A202692 for further information.

%Y Cf. A202694.

%K nonn,tabl,more

%O 1,3

%A _N. J. A. Sloane_, Dec 23 2011