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A049207 Array T(m,n) of products of pronic numbers m(m+1) * n(n+1) read by antidiagonals ("bipronics"). 2
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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..66.

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

Cf. A002378, A072389, A053990.

Sequence in context: A249346 A035539 A178517 * A092219 A262227 A069026

Adjacent sequences:  A049204 A049205 A049206 * A049208 A049209 A049210

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

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Last modified December 19 06:03 EST 2018. Contains 318245 sequences. (Running on oeis4.)