A091607 Column 4 of triangle A091602.

1, 0, 1, 1, 3, 3, 5, 6, 10, 12, 18, 22, 32, 39, 54, 67, 89, 110, 144, 177, 228, 280, 354, 433, 542, 659, 816, 989, 1214, 1464, 1784, 2142, 2593, 3101, 3730, 4444, 5318, 6310, 7514, 8886, 10534, 12413, 14656, 17214, 20249, 23711, 27790, 32447, 37908, 44134

Offset: 4

Author

Christian G. Bower, Jan 23 2004

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 4..1000

Formula

a(n) = A035959(n) - A001935(n).