A001410 Sum of rows of triangle defined in A001404.

1, 2, 5, 12, 28, 65, 149, 341, 777, 1769, 4022, 9140, 20763, 47156, 107086, 243162, 552128, 1253640, 2846424, 6462827, 14673824, 33316766, 75645245, 171751292, 389958283, 885393129, 2010268490

Offset

0,2

Comments

Also, limit to which the reflected rows of A001404 converge. - Ralf Stephan, Oct 17 2004

Links

Table of n, a(n) for n=0..26.

Maple

a[ 0, 0 ] := 1; for i from 1 to N do a[ i, 0 ] := a[ i-1, 0 ]+a[ i-1, 1 ]; for j from 1 to i do a[ i, j ] := sum(a[ i-j, t ], t=0..min(j+1, N)) od; od; b[ n ] := sum(a[ n, i ], i=0..n);

Crossrefs

Cf. A001404.

Sequence in context: A045623 A290990 A324586 * A258898 A019486 A019485

Adjacent sequences: A001407 A001408 A001409 * A001411 A001412 A001413

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved