A022778 Place where n-th 1 occurs in A023116.

1, 2, 4, 6, 9, 12, 16, 21, 26, 32, 38, 45, 52, 60, 69, 78, 88, 98, 109, 120, 132, 145, 158, 172, 186, 201, 217, 233, 250, 267, 285, 303, 322, 342, 362, 383, 404, 426, 448, 471, 495, 519, 544, 569, 595, 621, 648, 676, 704, 733, 762, 792, 823, 854

Offset

1,2

Comments

Also place where first n appears in A007337. - Franklin T. Adams-Watters, Nov 10 2006

Links

Clark Kimberling, Table of n, a(n) for n = 1..1000

Formula

a(n) = n + 1 + Sum{floor[(n - k)/sqrt(3)], k = 0..n}.

Mathematica

Table[n + 1 + Sum[Floor[(n - k)/Sqrt[3]], {k, 0, n}], {n, 0, 200}] (* A022778 *)
(* Clark Kimberling, Mar 14 2015 *)

Crossrefs

Cf. A022776, A244977.

Sequence in context: A292459 A194250 A024610 * A156022 A224809 A327094

Adjacent sequences: A022775 A022776 A022777 * A022779 A022780 A022781

Keyword

nonn

Author

Clark Kimberling

Status

approved