A164342 Row sums of table A164341.

1, 4, 9, 27, 61, 185, 469, 1456, 4368, 14720, 50800, 190149, 735451, 3001161, 12659652, 55462967, 250186665, 1163114375, 5548002866, 27151477487, 135968479892, 696511087808, 3643182769117, 19449907766921, 105843172596610

Offset: 1

Author

Wouter Meeussen, Aug 13 2009

Keywords

• nonn

Links

• T. Kyle Petersen and Bridget Eileen Tenner, How to write a permutation as a product of involutions (and why you might care), arXiv:1202.5319, 2012

Crossrefs

Cf. A164341.