cp's OEIS Frontend

A049207 Array T(m,n) of products of pronic numbers m(m+1) * n(n+1) read by antidiagonals ("bipronics").

%I A049207 #5 Mar 30 2012 17:35:51
%S A049207 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,
%T A049207 60,0,0,84,180,240,240,180,84,0,0,112,252,360,400,360,252,112,0,0,144,
%U A049207 336,504,600,600,504,336,144,0,0,180,432,672,840,900,840,672,432,180,0,0
%N A049207 Array T(m,n) of products of pronic numbers m(m+1) * n(n+1) read by antidiagonals ("bipronics").
%e A049207 Array begins
%e A049207 0 0 0 0 0 0 ...
%e A049207 0 4 12 24 40 ...
%e A049207 0 12 36 72 120 ...
%e A049207 0 24 72 144 240 ...
%p A049207 T := (m,n)->m*(m+1)*n*(n+1): seq(seq(T(q-p,p),p=0..q),q=0..12);
%Y A049207 Cf. A002378, A072389, A053990.
%K A049207 nonn,tabl,easy
%O A049207 0,5
%A A049207 Stuart M. Ellerstein (ellerstein(AT)aol.com), Jul 20 2002
%E A049207 Corrected and extended by _Emeric Deutsch_, Mar 04 2004