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 A090644 a(n)=(-1)^(n+1)*(5/4)*(25^n-1)*B(2n) where B(k) denotes the k-th Bernoulli number. 0
 0, 5, 26, 465, 16276, 924775, 77244126, 8900960285, 1352721569576, 262123002742995, 63076525023488626, 18453965152519328905, 6450731539245926745276, 2655232635637124377694015, 1271172942026336302668331526 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..14. MATHEMATICA Table[Abs[5/4*(25^n-1)*BernoulliB[2n]], {n, 0, 20}] (* Harvey P. Dale, Jan 22 2015 *) PROG (PARI) a(n)=(-1)^(n+1)*(5/4)*(25^n-1)*bernfrac(2*n) CROSSREFS Sequence in context: A077537 A140423 A324419 * A196951 A156217 A156216 Adjacent sequences: A090641 A090642 A090643 * A090645 A090646 A090647 KEYWORD nonn AUTHOR Benoit Cloitre, Dec 13 2003 STATUS approved

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Last modified April 17 12:12 EDT 2024. Contains 371763 sequences. (Running on oeis4.)