This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A030056 C(2n+1,n-6). 4
 1, 15, 136, 969, 5985, 33649, 177100, 888030, 4292145, 20160075, 92561040, 417225900, 1852482996, 8122425444, 35240152720, 151532656696, 646626422970, 2741188875414, 11554258485616, 48459472266975 (list; graph; refs; listen; history; text; internal format)
 OFFSET 6,2 LINKS Chai Wah Wu, Table of n, a(n) for n = 6..500 Milan Janjic, Two Enumerative Functions FORMULA a(n+1) = a(n)*(2*n+2)*(2*n+3)/((n-5)*(n+8)). - Chai Wah Wu, Jan 26 2016 PROG (Python) from __future__ import division A030056_list, b = [], 1 for n in range(6, 501):     A030056_list.append(b)     b = b*(2*n+2)*(2*n+3)//((n-5)*(n+8)) # Chai Wah Wu, Jan 26 2016 CROSSREFS Diagonal 14 of triangle A100257. Sequence in context: A155648 A126536 A299033 * A225978 A175707 A123955 Adjacent sequences:  A030053 A030054 A030055 * A030057 A030058 A030059 KEYWORD nonn AUTHOR 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 October 19 13:01 EDT 2019. Contains 328222 sequences. (Running on oeis4.)