A097307 Row sums of array A097306.

1, 1, 3, 3, 6, 8, 13, 15, 26, 31, 46, 56, 81, 95, 140, 160, 221, 261, 351, 406, 548, 626, 820, 945, 1221, 1393, 1788, 2035, 2566, 2928, 3656, 4139, 5146, 5810, 7148, 8078, 9850, 11086, 13461, 15116, 18214, 20441, 24489, 27400, 32708, 36516, 43329, 48345

Offset: 1

Author

Wolfdieter Lang, Aug 13 2004

Keywords

• nonn
• easy

Formula

a(n) = Sum_{k=1..ceiling(n/2)} A097306(n,k).