A225568 Number of entries in each row of the irregular triangles specified in A225777 and A225542.

1, 1, 2, 1, 2, 5, 1, 3, 5, 10, 1, 3, 6, 10, 17, 1, 4, 9, 12, 17, 26, 1, 4, 9, 14, 19, 26, 37, 1, 5, 10, 19, 22, 29, 29, 50

Offset

1,3

Links

Table of n, a(n) for n=1..36.

Example

The 6th rows of A225777 and A225542, that is, when n = 3 and k = 3, both contain 5 entries, so a(6) = 5.

Crossrefs

Cf. A225777, A225542.

Sequence in context: A210223 A361600 A242598 * A291694 A135506 A295516

Adjacent sequences: A225565 A225566 A225567 * A225569 A225570 A225571

Keyword

nonn

Author

Christopher Hunt Gribble, Jul 28 2013

Status

approved