A166048 a(n) = (A166049(n)-1)/4.

0, 1, 2, 3, 5, 6, 9, 12, 20, 21, 23, 30, 41, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462, 506, 552, 600, 650, 702, 756, 812, 870, 930, 992, 1056, 1122, 1190, 1260, 1332, 1406, 1482, 1560, 1640, 1722, 1806, 1892, 1980, 2070

Offset: 1

Author

Antti Karttunen, Oct 08 2009

Keywords

• nonn

Comments

Indexing sequence for A166049.