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 A111686 (n+1) + (n+1)(n+2) + ..., with n terms. 2
 2, 15, 144, 1925, 33648, 726327, 18636560, 553680369, 18684924840, 705833193923, 29502690532392, 1351724235304365, 67359683340291104, 3627011494019437935, 209846445862386234528, 12982402818188717219657, 855210841645834409812920 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..365 Eric Weisstein's World of Mathematics, Rising Factorial. EXAMPLE a(3) = 4+ 4*5 +4*5*6 = 144. MAPLE a:=n->sum((n+j)!, j=1..n)/n!: seq(a(n), n=1..18); # Emeric Deutsch, Aug 27 2005 CROSSREFS Cf. A111685, A054654. Sequence in context: A219868 A224885 A253571 * A001854 A060226 A325060 Adjacent sequences:  A111683 A111684 A111685 * A111687 A111688 A111689 KEYWORD nonn AUTHOR Amarnath Murthy, Aug 16 2005 EXTENSIONS a(6)-a(10) from Jonathan Vos Post Aug 17 2005 More terms from Emeric Deutsch, Aug 27 2005 STATUS approved

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Last modified October 14 02:29 EDT 2019. Contains 327995 sequences. (Running on oeis4.)