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 A344918 a(n) = denominator(4^(n + 1)*zeta(-n, 1/4)). 1
 1, 6, 1, 60, 1, 126, 1, 120, 1, 66, 1, 16380, 1, 6, 1, 4080, 1, 7182, 1, 3300, 1, 138, 1, 32760, 1, 6, 1, 1740, 1, 42966, 1, 8160, 1, 6, 1, 34545420, 1, 6, 1, 270600, 1, 37926, 1, 1380, 1, 282, 1, 1113840, 1, 66, 1, 3180, 1, 21546, 1, 3480, 1, 354, 1, 1703601900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS EXAMPLE Rational sequence starts: 1, 1/6, -1, -7/60, 5, 31/126, -61, -127/120, 1385, ... MAPLE seq(denom(4^(n + 1)*Zeta(0, -n, 1/4)), n = 0..59); PROG (SageMath) def a(n): return 4^(n+1)*hurwitz_zeta(-n, 1/4) print([a(n).denominator() for n in (0..59)]) CROSSREFS Cf. A344917 (numerators). Sequence in context: A049213 A165886 A339100 * A174502 A056218 A292219 Adjacent sequences:  A344915 A344916 A344917 * A344919 A344920 A344921 KEYWORD nonn,frac AUTHOR Peter Luschny, Jul 09 2021 STATUS approved

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Last modified September 28 04:24 EDT 2021. Contains 347698 sequences. (Running on oeis4.)