OFFSET
1,5
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1275 (first 50 antidiagonals)
FORMULA
T(n,m) = T(m,n).
EXAMPLE
Array begins:
===============================================
n/m | 1 2 3 4 5 6 7 ...
----+------------------------------------------
1 | 1 1 1 1 1 1 1 ...
2 | 1 2 5 9 19 35 71 ...
3 | 1 5 19 63 192 576 1698 ...
4 | 1 9 63 298 1246 4857 18768 ...
5 | 1 19 192 1246 6351 29467 134397 ...
6 | 1 35 576 4857 29467 152516 763479 ...
7 | 1 71 1698 18768 134397 763479 3982186 ...
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Andrew Howroyd, Aug 31 2024
STATUS
approved