The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A217757 Product_{i=0..n} (i! + 1). 5
 2, 4, 12, 84, 2100, 254100, 183206100, 923541950100, 37238134969982100, 13513011656042074430100, 49036030210457135734021310100, 1957361459740805606124917565020990100, 937579272951542930363610919638075856505150100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..42 FORMULA a(n) ~ c * A000178(n), where c = A238695 = Product_{k>=0} (1 + 1/k!) = 7.364308272367257256372772509631... . - Vaclav Kotesovec, Jul 20 2015 MAPLE a:= proc(n) a(n):= `if`(n=0, 2, a(n-1)*(n!+1)) end: seq(a(n), n=0..14);  # Alois P. Heinz, May 20 2013 MATHEMATICA Table[Product[i!+1, {i, 0, n}], {n, 0, 12}]  (* Geoffrey Critzer, May 04 2013 *) Rest[FoldList[Times, 1, Range[0, 15]!+1]] (* Harvey P. Dale, May 28 2013 *) PROG (JavaScript) function factorial(n) { var i, c=1; for (i=2; i<=n; i++) c*=i; return c; } a=2; for (j=1; j<10; j++) { a*=(factorial(j)+1); document.write(a+", "); } CROSSREFS Cf. A000142, A000178, A054640, A082480, A258325, A260231, A306729. Sequence in context: A001206 A144295 A119489 * A053631 A319634 A217041 Adjacent sequences:  A217754 A217755 A217756 * A217758 A217759 A217760 KEYWORD nonn AUTHOR Jon Perry, Mar 23 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 14 19:45 EDT 2020. Contains 336483 sequences. (Running on oeis4.)