A166018 Left edge of triangular table A138612.

1, 2, 3, 5, 6, 8, 9, 10, 13, 14, 16, 17, 18, 21, 22, 24, 25, 29, 30, 31, 32, 34, 36, 38, 40, 41, 44, 45, 47, 48, 51, 54, 55, 56, 58, 59, 62, 63, 65, 67, 69, 72, 73, 74, 75, 77, 80, 81, 83, 84, 87, 89, 92, 94, 96, 98, 99, 100, 102, 103, 104, 109, 110, 111, 113, 116, 118

Offset: 1

Author

Antti Karttunen, Oct 05 2009

Keywords

• nonn

Formula

a(n) = A138612(A000124(n-1)).