login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A023853 Sum of exponents in prime-power factorization of C(6n,2n). 0
2, 4, 6, 6, 8, 11, 11, 10, 11, 13, 18, 17, 17, 17, 19, 18, 20, 19, 22, 22, 23, 27, 28, 27, 26, 29, 31, 29, 31, 32, 35, 31, 31, 31, 35, 33, 35, 37, 36, 36, 37, 39, 43, 42, 43, 46, 47, 43, 44, 45, 48, 47, 46, 50, 53, 51, 52, 53, 57, 55, 55, 56, 56, 51, 52, 54, 56, 56, 55, 58, 62, 58, 59, 60, 61, 62 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

Table[Total[Transpose[FactorInteger[Binomial[6 n, 2 n]]] [[2]]], {n, 80}] (* From Harvey P. Dale, June 28 2011 *)

CROSSREFS

Sequence in context: A099188 A085271 A003972 * A056526 A049066 A151688

Adjacent sequences:  A023850 A023851 A023852 * A023854 A023855 A023856

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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 .

Last modified February 16 01:56 EST 2012. Contains 205860 sequences.