A086607 Main diagonal of triangle A086606: the n-th term of the n-th self-convolution of the sequence formed by flattening triangle A086606.

1, 2, 9, 32, 140, 630, 2870, 13256, 61389, 286710, 1346004, 6351516, 30088071, 142997456, 681498600, 3255674016, 15585877627, 74752865964, 359121640259, 1727811098500, 8323912135434, 40149494252802, 193868148499388, 937055479499472, 4533362484840700

Offset: 1

Author

Paul D. Hanna, Jul 23 2003

Keywords

• nonn

Crossrefs

Cf. A086606, A086608 (row sums).