This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A091132 Decimal expansion of e^2 - 2e. 0
 1, 9, 5, 2, 4, 9, 2, 4, 4, 2, 0, 1, 2, 5, 5, 9, 7, 5, 6, 5, 0, 9, 8, 5, 2, 5, 1, 7, 8, 6, 9, 6, 8, 2, 8, 1, 7, 6, 6, 5, 8, 2, 1, 3, 8, 3, 1, 5, 1, 9, 2, 8, 1, 7, 4, 1, 5, 3, 1, 9, 2, 5, 6, 7, 0, 7, 4, 4, 2, 0, 5, 3, 5, 3, 7, 1, 9, 6, 2, 5, 7, 4, 2, 4, 1, 5, 4, 8, 1, 2, 8, 0, 2, 8, 7, 8, 8, 9, 3, 9, 9, 1 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Average length of the 2nd increasing run in a random permutation of n integers as n->Infinity. LINKS Eric Weisstein's World of Mathematics, Permutation FORMULA Equals (sum_{n>0}(sum_{k>0} 1/(n!*k!)))-1. - Fredrik Johansson, Apr 21 2006 EXAMPLE -2*e + e^2 = 1.95249244... CROSSREFS Sequence in context: A020827 A154971 A021109 * A155165 A199061 A075838 Adjacent sequences:  A091129 A091130 A091131 * A091133 A091134 A091135 KEYWORD nonn,cons,easy AUTHOR Eric W. Weisstein, Dec 19, 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .