This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A064813 a(n) = binomial(composite(n), n), where composite = A002808, composite numbers. 1
 4, 15, 56, 126, 252, 924, 3432, 6435, 11440, 43758, 167960, 293930, 497420, 1961256, 3268760, 5311735, 8436285, 13123110, 54627300, 225792840, 354817320, 548354040, 834451800, 1251677700, 5414950296, 8122425444, 12033222880 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harry J. Smith, Table of n, a(n) for n = 1..200 PROG (PARI)j=0; i=4; while(i<100, while(isprime(i), i=i+1); j=j+1; print(binomial(i, j)); i=i+1) (PARI) nextComp(n)= { if (!isprime(n), return(n)); return(n + 1) } { c=3; for (n=1, 200, c=nextComp(c + 1); write("b064813.txt", n, " ", binomial(c, n)) ) } \\ Harry J. Smith, Sep 27 2009 CROSSREFS Cf. A002808, A060604. Sequence in context: A050183 A094375 A047018 * A183932 A009940 A081163 Adjacent sequences:  A064810 A064811 A064812 * A064814 A064815 A064816 KEYWORD nonn AUTHOR Reinhard Zumkeller, Oct 23 2001 EXTENSIONS More terms from Matthew Conroy, Oct 30 2001 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 February 19 12:09 EST 2019. Contains 320310 sequences. (Running on oeis4.)