This site is supported by donations to The OEIS Foundation.

 Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

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