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A140814 Denominators of Bernoulli numbers (variant). 1
3, 6, 30, 42, 30, 66, 2730, 6, 510, 798, 330, 138, 2730, 6, 870, 14322, 510, 6, 1919190, 6, 13530, 1806, 690, 282, 46410, 66, 1590, 798, 870, 354, 56786730, 6, 510, 64722, 30, 4686, 140100870, 6, 30, 3318, 230010 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

a(n)= A106458(2n)+A106458(2n+1) .

a(n)= A002445(n), n>0. 3 | a(n).

CROSSREFS

Cf. A140816.

Sequence in context: A065943 A025555 A200925 * A136932 A136945 A136894

Adjacent sequences:  A140811 A140812 A140813 * A140815 A140816 A140817

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Jul 16 2008

EXTENSIONS

Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 29 2008

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Last modified February 16 15:27 EST 2012. Contains 205930 sequences.