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A100650 Denominator of 1 - Sum_{i=1..n} Bernoulli(i). 7
1, 2, 3, 3, 30, 30, 35, 35, 210, 210, 1155, 1155, 10010, 10010, 15015, 15015, 510510, 510510, 1616615, 1616615, 1939938, 1939938, 22309287, 22309287, 74364290, 74364290, 111546435, 111546435, 6469693230, 6469693230, 33426748355, 33426748355, 200560490130, 200560490130 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..33.

EXAMPLE

1, 3/2, 4/3, 4/3, 41/30, 41/30, 47/35, 47/35, 289/210, 289/210, 1502/1155, 1502/1155, 15551/10010, 15551/10010, 5809/15015, 5809/15015, 3818123/510510, 3818123/510510, ... = A100649/A100650.

MAPLE

A100650 := proc(n) 1-add( bernoulli(i), i=1..n) ; denom(%) ; end proc: # R. J. Mathar, Jul 01 2011

MATHEMATICA

Denominator[1-Accumulate[BernoulliB[Range[0, 40]]]] (* Harvey P. Dale, Feb 19 2015 *)

CROSSREFS

Sequence in context: A084956 A281786 A319354 * A096502 A101462 A242786

Adjacent sequences:  A100647 A100648 A100649 * A100651 A100652 A100653

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Dec 05 2004

STATUS

approved

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Last modified September 20 06:19 EDT 2019. Contains 327212 sequences. (Running on oeis4.)