A182544 Triangle read by rows: row n (n>=1) enumerates marked mesh patterns of type R_n^(1,0,2,0).

1, 2, 6, 22, 2, 90, 26, 4, 394, 232, 82, 12, 1806, 1776, 1062, 348, 48, 8558, 12546, 11118, 6022, 1836, 240

Offset

1,2

Links

Table of n, a(n) for n=1..23.

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

Example

Triangle begins:
1
2
6
22 2
90 26 4
394 232 82 12
1806 1776 1062 348 48
8558 12546 11118 6022 1836 240
...

Crossrefs

Cf. A006318, A211319, A211320.

Sequence in context: A156155 A317725 A263486 * A216120 A216964 A187250

Adjacent sequences: A182541 A182542 A182543 * A182545 A182546 A182547

Keyword

nonn,tabf,more

Author

N. J. A. Sloane, May 04 2012

Status

approved