A211321 Triangle read by rows: row n (n>=1) enumerates marked mesh patterns of type R_n^(2,0,2,0).

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

Offset

1,2

Links

Table of n, a(n) for n=1..18.

Sergey Kitaev and Jeffrey Remmel, Simple marked mesh patterns, arXiv preprint arXiv:1201.1323, 2012

Example

Triangle begins:
1
2
6
24
116 4
632 80 8
3720 1056 240 24
23072 11680 4480 992 96
...

Crossrefs

Cf. A212198.

Sequence in context: A128088 A069657 A369766 * A242820 A228395 A082631

Adjacent sequences: A211318 A211319 A211320 * A211322 A211323 A211324

Keyword

nonn,tabf,more

Author

N. J. A. Sloane, May 04 2012

Status

approved