A211321 - OEIS

A211321

Triangle read by rows: row n (n>=1) enumerates marked mesh patterns of type R_n^(2,0,2,0).

%I #16 Nov 05 2025 15:22:22

%S 1,2,6,24,116,4,632,80,8,3720,1056,240,24,23072,11680,4480,992,96

%N Triangle read by rows: row n (n>=1) enumerates marked mesh patterns of type R_n^(2,0,2,0).

%H Sergey Kitaev and Jeffrey Remmel, <a href="https://arxiv.org/abs/1201.1323">Simple marked mesh patterns</a>, arXiv preprint arXiv:1201.1323 [math.CO], 2012.

%e Triangle begins:

%e 1

%e 2

%e 6

%e 24

%e 116 4

%e 632 80 8

%e 3720 1056 240 24

%e 23072 11680 4480 992 96

%e ...

%Y Cf. A212198.

%K nonn,tabf,more

%O 1,2

%A _N. J. A. Sloane_, May 04 2012