|
Search: id:A069989
|
|
|
| A069989 |
|
(-1)^(n+1)/2*sum(k=1,2n,C(2n+1,k)*B(k)*4^k) where C(n,k) are the binomial coefficients, B(k) the Bernoulli numbers. |
|
+0
1
|
|
| 1, 13, 213, 6233, 277865, 17567973, 1495207357, 164827853233, 22846356916689, 3888897476494013, 797512055521085861, 193931677044463586313, 55175478875457172546873, 18157764800352633049290133
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
PROGRAM
|
(PARI) for(n=1, 25, print1(-(-1)^n*sum(i=1, 2*n, binomial(2*n+1, i)*bernfrac(i)*3^i)/2, ", "))
|
|
CROSSREFS
|
Sequence in context: A059355 A145270 A132542 this_sequence A140517 A096141 A059525
Adjacent sequences: A069986 A069987 A069988 this_sequence A069990 A069991 A069992
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Benoit Cloitre (benoit7848c(AT)orange.fr), May 01 2002
|
|
|
Search completed in 0.002 seconds
|
