login
A049207
Array T(m,n) of products of pronic numbers m(m+1) * n(n+1) read by antidiagonals ("bipronics").
1
0, 0, 0, 0, 4, 0, 0, 12, 12, 0, 0, 24, 36, 24, 0, 0, 40, 72, 72, 40, 0, 0, 60, 120, 144, 120, 60, 0, 0, 84, 180, 240, 240, 180, 84, 0, 0, 112, 252, 360, 400, 360, 252, 112, 0, 0, 144, 336, 504, 600, 600, 504, 336, 144, 0, 0, 180, 432, 672, 840, 900, 840, 672, 432, 180, 0, 0
OFFSET
0,5
EXAMPLE
Array begins
0 0 0 0 0 0 ...
0 4 12 24 40 ...
0 12 36 72 120 ...
0 24 72 144 240 ...
MAPLE
T := (m, n)->m*(m+1)*n*(n+1): seq(seq(T(q-p, p), p=0..q), q=0..12);
CROSSREFS
KEYWORD
nonn,tabl,easy
AUTHOR
Stuart M. Ellerstein (ellerstein(AT)aol.com), Jul 20 2002
EXTENSIONS
Corrected and extended by Emeric Deutsch, Mar 04 2004
STATUS
approved