A083277 k appears 3k-2 times.

1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8

Offset: 1

Author

Daniele Parisse, Jun 02 2003, Jul 07 2007

Keywords

• nonn

Crossrefs

Cf. A016777 (3n-2 with offset 1).

Partial sums of A255849.

Programs

PARI

a(n) = (7+sqrt(24*n-23))\6; \\ Michel Marcus, Oct 30 2019

Formula

a(n) = ceiling((1+sqrt(24*n+1))/6) = floor((7+sqrt(24*n-23))/6).