OFFSET
1,5
COMMENTS
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 4 11 26 57 120 247 ...
3 | 1 11 56 212 701 2179 6600 ...
4 | 1 26 212 1112 4793 19082 74368 ...
5 | 1 57 701 4793 25000 116852 535776 ...
6 | 1 120 2179 19082 116852 607712 3048668 ...
7 | 1 247 6600 74368 535776 3048668 15918280 ...
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Andrew Howroyd, Aug 31 2024
STATUS
approved