The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A303991 Row sums of triangle A303990. 3
 1, 18, 804, 70980, 10436805, 2303750526, 712510404592, 294018013725192, 156070751204023425, 103597044789173411410, 84072367255899882570876, 81892130447332894817380044, 94289343231845338982163322837, 126676207083751543195799431746150, 196394200592428254386554058525461440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Seiichi Manyama, Table of n, a(n) for n = 1..214 FORMULA a(n) = Sum_{k=1..n} A303990(n, k) = Sum_{k=1..n} n^k * k^n, for n >= 1. a(n) ~ n^(2*n). - Vaclav Kotesovec, Feb 09 2022 MATHEMATICA Total /@ Table[n^k k^n, {n, 15}, {k, n}] (* Michael De Vlieger, May 24 2018 *) PROG (PARI) a(n) = sum(k=1, n, n^k * k^n); \\ Michel Marcus, May 25 2018 CROSSREFS Cf. A303990. Sequence in context: A259458 A180781 A264468 * A033471 A128074 A049655 Adjacent sequences:  A303988 A303989 A303990 * A303992 A303993 A303994 KEYWORD nonn,easy AUTHOR Wolfdieter Lang, May 22 2018 STATUS approved

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

Last modified August 12 04:46 EDT 2022. Contains 356067 sequences. (Running on oeis4.)