A166020 Row sums of triangular table A138612.
1, 6, 22, 63, 139, 277, 481, 785, 1256, 1851, 2688, 3692, 5055, 6731, 8797, 11239, 14175, 17834, 21947, 26701, 32181, 38769, 46002, 54364, 63742, 74455, 86182, 99345, 114094, 130213, 148293, 167991, 189584, 212705, 238497, 266350, 297058
Offset: 1