cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A147294 Eigentriangle, row sums = A125275.

Original entry on oeis.org

1, 1, 1, 2, 3, 2, 5, 9, 10, 7, 14, 28, 40, 49, 31, 42, 90, 150, 245, 279, 162, 132, 297, 550, 1078, 1674, 1782, 968, 429, 1001, 2002, 4459, 8463, 12474, 12584, 6481, 1430, 3432, 7280, 17836, 39060, 71280, 100672, 97215, 47893
Offset: 1

Views

Author

Gary W. Adamson, Nov 05 2008

Keywords

Comments

Row sums = A125275 starting with offset 1: (1, 2, 7, 31, 162, 968,...).
Left border = A000108, right border = A125275.
Sum of n-th row terms = rightmost term of next row.

Examples

			First few rows of the triangle =
1;
1, 1;
2, 3, 2;
5, 9, 10, 7;
14, 28, 40, 49, 31;
42, 90, 150, 245, 279, 162;
132, 297, 550, 1078, 1674, 1782, 968;
429, 1001, 2002, 4459, 8463, 12474, 12584, 6481;
1430, 3432, 7280, 17836, 39060, 71280, 100672, 97215, 47893;
...
Row 4 = (5, 9, 10, 7) = termwise products of (5, 9, 5, 1) and (1, 1, 2, 7)
		

Crossrefs

Formula

A147294 = Triangle A039599 * (A125275 * 0^(n-k)); where (A125275 * 0^(n-k)) = an infinite lower triangular matrix with A125275: (1, 1, 2, 7, 31, 162,...) as the main diagonal and the rest zeros.