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 A074702 a(n) = ((n+1)^2*(n-1)*a(n-1)+(-1)^(n+1))/n. 1
 1, 4, 43, 806, 23213, 947864, 51997111, 3685295242, 327581799289, 35673657942572, 4670006130663971, 723461783075360174, 130890931830249779173, 27346855400248614577216, 6534075316966068976316143, 1770326031190494313270654994, 539845302687736618823239734641 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..252 FORMULA a(n) = round((n+1)!^2*BesselJ(0, 2))/n. MATHEMATICA nxt[{n_, a_}]:={n+1, (n*a*(n+2)^2+(-1)^(n+2))/(n+1)}; Transpose[ NestList[ nxt, {1, 1}, 15]][[2]] (* Harvey P. Dale, Jun 26 2013 *) CROSSREFS Cf. A073701. Sequence in context: A198205 A277639 A326432 * A197717 A277456 A317140 Adjacent sequences: A074699 A074700 A074701 * A074703 A074704 A074705 KEYWORD easy,nonn AUTHOR Vladeta Jovovic, Sep 03 2002 EXTENSIONS More terms from Emeric Deutsch, Dec 18 2003 More terms from Harvey P. Dale, Jun 26 2013 STATUS approved

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Last modified November 30 09:19 EST 2022. Contains 358438 sequences. (Running on oeis4.)