The OEIS is supported by the many generous donors to the OEIS 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 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A276400 Denominator of n!/(n^n-n). 2
 1, 4, 21, 26, 1555, 817, 299593, 134521, 12345679, 43229041, 67546215517, 4622635937, 61054982558011, 18617937516193, 5118976599431, 4224061794762749, 128583032925805678351, 655879001624535409, 275941052631578947368421, 286115209221463953761, 2707038020425761202263187 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 LINKS Chai Wah Wu, Table of n, a(n) for n = 2..389 Natasha Morrison and Alex Scott, Maximizing the number of induced cycles in a graph, Preprint, 2016. See Conj. 1.1. EXAMPLE 1, 1/4, 2/21, 1/26, 24/1555, 5/817, 720/299593, 126/134521, 4480/12345679, 6048/43229041, 3628800/67546215517, 95040/4622635937, 479001600/61054982558011, ... MATHEMATICA Table[Denominator[n! / (n^n - n)], {n, 2, 30}] (* Vincenzo Librandi, Sep 12 2016 *) PROG (Python) from __future__ import division from math import factorial from fractions import gcd def A276400(n): a = n**(n-1) - 1 return a//gcd(factorial(n-1), a) # Chai Wah Wu, Sep 11 2016 (Magma) [Denominator(Factorial(n)/(n^n-n)): n in [2..25]]; // Vincenzo Librandi, Sep 12 2016 CROSSREFS Cf. A276399. Sequence in context: A041821 A042429 A356357 * A304770 A316513 A273208 Adjacent sequences: A276397 A276398 A276399 * A276401 A276402 A276403 KEYWORD nonn,frac AUTHOR N. J. A. Sloane, Sep 11 2016 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 December 6 06:19 EST 2022. Contains 358595 sequences. (Running on oeis4.)