A108074 - OEIS

A108074

Triangle in A071944 with rows reversed.

1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 16, 9, 4, 1, 63, 54, 31, 14, 5, 1, 219, 188, 111, 52, 20, 6, 1, 787, 676, 405, 197, 80, 27, 7, 1, 2897, 2492, 1508, 752, 320, 116, 35, 8, 1, 10869, 9361, 5712, 2900, 1276, 489, 161, 44, 9, 1, 41414, 35702, 21933, 11296, 5095, 2034, 714

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

0,4

COMMENTS

A convolution triangle of numbers based on A071969. - Philippe Deléham, Sep 15 2005

LINKS

Table of n, a(n) for n=0..61.

FORMULA

T(0, 0) = 1; T(n, k) = 0 if k<0 or if k>n; T(n, k) = Sum_{j>=0} T(n-1, k-1+j) + Sum_{j>=0} T(n-1, k+2+j). - Philippe Deléham, Sep 15 2005

EXAMPLE

Triangle begins:

1, 1;