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A069239 Denominator of coefficient G_n defined by Sum_{ (m,m') != (0,0)} 1/(m+m'*sqrt(-2))^(2*n) = (4*w)^(2*n)*G_n/(2*n)!, where 2w is one of the periods of the associated Weierstrass P-function. 2
3, 3, 3, 3, 33, 3, 3, 51, 57, 33, 3, 3, 3, 3, 33, 51, 3, 57, 3, 1353, 129, 3, 3, 51, 33, 3, 57, 3, 177, 33 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

E. Dintzl, Über die Zahlen im Koerper k(sqrt(-2)), welche den Bernoulli'schen Zahlen analog sind, Sitz. K. Akad. Wiss. Wien, Math.-Naturw. Klasse, 108 (1909), 1-29.

LINKS

Table of n, a(n) for n=1..30.

FORMULA

For n >= 2, G_n = A069182(n-1)*(2*n)/(2^(2*n-1)*(-1+(-2)^n)).

EXAMPLE

G_1, G_2, ... = 2/3, 1/3, 2/3, 10/3, 700/33, 700/3, 9800/3, 3185000/51, ...

CROSSREFS

Cf. A069238, A069182, A069240.

Sequence in context: A278667 A232984 A098535 * A321080 A010265 A239963

Adjacent sequences:  A069236 A069237 A069238 * A069240 A069241 A069242

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Apr 13 2002

STATUS

approved

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Last modified November 14 23:06 EST 2018. Contains 317221 sequences. (Running on oeis4.)