A022785 Place where n-th 1 occurs in A023123.

1, 4, 10, 19, 30, 44, 61, 81, 103, 128, 156, 186, 219, 255, 294, 335, 379, 426, 475, 527, 582, 640, 700, 763, 829, 897, 968, 1042, 1119, 1198, 1280, 1365, 1452, 1542, 1635, 1731, 1829, 1930, 2034, 2141, 2250, 2362, 2477, 2594, 2714, 2837, 2963

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Programs

PARI

a(n)=1+sum(k=1,n-1,ceil(exp(1)*k)) \\ Benoit Cloitre, Jan 24 2009

Formula

a(n) = 1 + Sum_{k=1..n-1} ceiling(e*k). - Benoit Cloitre, Jan 24 2009