The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A324437 a(n) = Product_{i=1..n, j=1..n} (i^4 + j^4). 7
 2, 18496, 189567553208832, 53863903330477722171391434817536, 4194051697335929481600368256016484482740174637152337920000, 530545265060440849231458462212366841894726534233233018777709463062563850450708386692464640000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) ~ c * 2^(n*(n+1)) * exp(Pi*n*(n+1)/sqrt(2) - 6*n^2) * (1 + sqrt(2))^(sqrt(2)*n*(n+1)) * n^(4*n^2 - 1), where c = A306620 = 0.23451584451404279281807143317500518660696293944961... MATHEMATICA Table[Product[i^4 + j^4, {i, 1, n}, {j, 1, n}], {n, 1, 6}] CROSSREFS Cf. A079478, A307215, A324403, A324426, A324438, A324439, A324440. Sequence in context: A214544 A318716 A260252 * A158344 A319383 A124364 Adjacent sequences:  A324434 A324435 A324436 * A324438 A324439 A324440 KEYWORD nonn AUTHOR Vaclav Kotesovec, Feb 28 2019 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 2 05:01 EST 2021. Contains 349437 sequences. (Running on oeis4.)