OFFSET
1,2
COMMENTS
This sequence was formerly named "reversals of A051340", but it is actually the truncation of A051340 to its lower left triangular part, re-indexed to start rows and columns with 1. - M. F. Hasler, Aug 15 2015
FORMULA
EXAMPLE
First few rows of the triangle are:
1;
2, 1;
3, 1, 1;
4, 1, 1, 1;
5, 1, 1, 1, 1;
...
PROG
(PARI) A130296(i, j)=if(j==1, i, j<=i) \\ The sequence should not be defined for j>i but it is used in several places as infinite square matrix with upper right part equal to zero. - M. F. Hasler, Aug 15 2015
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, May 20 2007
STATUS
approved