A181116 Triangle T(n,k) read by rows. T(n,k) = A046643(A126988).

1, 1, 1, 1, 0, 1, 3, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 5, 3, 0, 1, 0, 0, 0, 1, 3, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 3, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1

Offset

1,7

Comments

Numerator in fraction A181116/A181117. A051731=(A181116/A181117)*(A181116/A181117).

Links

Table of n, a(n) for n=1..105.

Example

Triangle starts:
1,
1,1,
1,0,1,
3,1,0,1,
1,0,0,0,1,
1,1,1,0,0,1,
1,0,0,0,0,0,1,
5,3,0,1,0,0,0,1,
3,0,1,0,0,0,0,0,1,
1,1,0,0,1,0,0,0,0,1,
1,0,0,0,0,0,0,0,0,0,1,
3,1,3,1,0,1,0,0,0,0,0,1,
1,0,0,0,0,0,0,0,0,0,0,0,1,
1,1,0,0,0,0,1,0,0,0,0,0,0,1,
1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,

Crossrefs

Cf. A181117, A046643, A051731.

Sequence in context: A122960 A242887 A307753 * A051834 A121383 A194521

Adjacent sequences: A181113 A181114 A181115 * A181117 A181118 A181119

Keyword

nonn,tabl

Author

Mats Granvik, Oct 04 2010

Status

approved