A274652 Sum of n-th antidiagonal of the square array A274528.

0, 3, 6, 12, 13, 25, 36, 43, 57, 67, 100, 134, 115, 163, 153, 186, 185, 248, 277, 258, 306, 366, 370, 381, 528, 471, 607, 662, 610, 706, 778, 760, 783, 782, 950, 970, 975, 1194, 1206, 1175, 1301, 1393, 1438, 1261, 1584, 1549, 1592, 1645, 1776, 1783, 2010, 1956, 1953, 2353, 2441, 2258, 2468, 2342, 2635, 2663

Offset: 0

Author

Omar E. Pol, Jul 01 2016

Keywords

• nonn

Crossrefs

Cf. A269526, A274528, A274529, A274530.

Formula

a(n) = A274530(n+1) - n - 1.