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 A051848 Bisection of A023811, divided by the term position. 0
 1, 9, 373, 48913, 13717421, 6698798233, 5057809205989, 5465701947765793, 8008631808527689309, 15287592943577781017641, 36867279706750843040346261, 109619115381793714510485861169, 393991653133258067890987154457613, 1683967033137904529927995135566966713 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..14. FORMULA a(n) = A023811(2n)/(2n-1). [Corrected by Alexander R. Povolotsky, Oct 15 2022] a(n) = A221741(2n-1). - Alexander R. Povolotsky, Oct 15 2022 PROG (PARI) f(n) = (n^n-n^2)\(n-1)^2+1; \\ A023811 a(n) = f(2*n)/(2*n-1); \\ Michel Marcus, Oct 16 2022 CROSSREFS Cf. A023811, A051847, A221741. Sequence in context: A162084 A195518 A302131 * A238561 A290574 A218714 Adjacent sequences: A051845 A051846 A051847 * A051849 A051850 A051851 KEYWORD easy,nonn AUTHOR Antti Karttunen, Dec 13 1999 EXTENSIONS a(13) and a(14) added by Alexander R. Povolotsky, Oct 16 2022 STATUS approved

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Last modified June 9 06:42 EDT 2023. Contains 363168 sequences. (Running on oeis4.)