This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A167543 a(n) = (n-5)*(n-6)*(n-7)*(n-16)/24. 1
 -2, -7, -15, -25, -35, -42, -42, -30, 0, 55, 143, 273, 455, 700, 1020, 1428, 1938, 2565, 3325, 4235, 5313, 6578, 8050, 9750, 11700, 13923, 16443, 19285, 22475, 26040, 30008, 34408, 39270, 44625, 50505, 56943, 63973, 71630, 79950, 88970, 98728, 109263, 120615 (list; graph; refs; listen; history; text; internal format)
 OFFSET 8,1 LINKS G. C. Greubel, Table of n, a(n) for n = 8..1000 FORMULA a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5). G.f.: x^8*(-2+3*x)/(1-x)^5. MATHEMATICA Table[(n - 5)*(n - 6)*(n - 7)*(n - 16)/24, {n, 8, 100}] (* G. C. Greubel, Jun 15 2016 *) CROSSREFS Cf. A135929, A137276. Sequence in context: A070898 A132746 A252475 * A184976 A194140 A029888 Adjacent sequences:  A167540 A167541 A167542 * A167544 A167545 A167546 KEYWORD sign,easy AUTHOR Jamel Ghanouchi, Nov 06 2009 EXTENSIONS Definition simplified, sequence extended by R. J. Mathar, Nov 12 2009 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.