|
Search: id:A159667
|
|
| |
|
| 1, 2, 6, 26, 133, 905, 6521, 57126, 544820, 5878219, 66851119, 881424550, 11803494823, 175906313032, 2767829058956, 47008174824136, 821285150996811, 15816596073011143, 308160754687446289, 6498330632792677804
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
a(n) is divisible by n, for all n >= 1.
|
|
MATHEMATICA
|
f[n_] := f[n] = Sum[Binomial[n, k] GCD[n, k] f[k - 1], {k, n}]; f[0] = 1; Table[f@n/n, {n, 22}] [From Robert G. Wilson v (rgwv(AT)rgwv.com), May 27 2009]
|
|
CROSSREFS
|
A159666
Sequence in context: A030850 A030951 A030876 this_sequence A030957 A030898 A002788
Adjacent sequences: A159664 A159665 A159666 this_sequence A159668 A159669 A159670
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Apr 19 2009
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 27 2009
|
|
|
Search completed in 0.002 seconds
|
