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A172282
Squares of Bernoulli number denominators A027642.
3
1, 4, 36, 1, 900, 1, 1764, 1, 900, 1, 4356, 1, 7452900, 1, 36, 1, 260100, 1, 636804, 1, 108900, 1, 19044, 1, 7452900, 1, 36, 1, 756900, 1, 205119684, 1, 260100, 1, 36, 1, 3683290256100, 1, 36, 1, 183060900, 1, 3261636, 1, 476100, 1, 79524, 1, 2153888100, 1, 4356, 1, 2528100
OFFSET
0,2
COMMENTS
Compare the sequence for example with A120083.
LINKS
FORMULA
a(n) = A027642(n)^2 .
MATHEMATICA
Denominator[BernoulliB[Range[0, 60]]]^2 (* Harvey P. Dale, Sep 26 2024 *)
PROG
(PARI) A172282(n) = (denominator(bernfrac(n))^2); \\ Antti Karttunen, Dec 19 2018
CROSSREFS
Sequence in context: A123745 A183882 A053426 * A120083 A110219 A174413
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Jan 30 2010
EXTENSIONS
Edited and extended by R. J. Mathar, Feb 02 2010
STATUS
approved