The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A111781 Eighth column (m=7) of unsigned triangle A111595. 0
 1, 56, 2052, 63000, 1777050, 48149640, 1284709140, 34260506280, 921799753875, 25175488338000, 700755564108600, 19932553764723600, 580406741946731700, 17320767850295910000, 530112107596146075000, 16645556950225160958000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 7,2 LINKS Table of n, a(n) for n=7..22. FORMULA E.g.f. (1/sqrt(1-x^2))*((x/(1-x))^7)/7!. a(n)=(n!/7!)*sum(binomial(2*k, k)*binomial(n-2*k-1, 6)/(4^k), k=0..floor((n-7)/2)), n>=7. CROSSREFS Sequence in context: A332859 A004387 A111597 * A221398 A280803 A124101 Adjacent sequences: A111778 A111779 A111780 * A111782 A111783 A111784 KEYWORD nonn,easy AUTHOR Wolfdieter Lang, Aug 23 2005 STATUS approved

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

Last modified September 11 17:54 EDT 2024. Contains 375839 sequences. (Running on oeis4.)