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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Compare the sequence for example with A120083.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..4096

FORMULA

a(n) = A027642(n)^2 .

PROG

(PARI) A172282(n) = (denominator(bernfrac(n))^2); \\ Antti Karttunen, Dec 19 2018

CROSSREFS

Cf. A120083, A172298.

Sequence in context: A123745 A183882 A053426 * A120083 A110219 A174413

Adjacent sequences:  A172279 A172280 A172281 * A172283 A172284 A172285

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Jan 30 2010

EXTENSIONS

Edited and extended by R. J. Mathar, Feb 02 2010

STATUS

approved

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Last modified November 12 13:43 EST 2019. Contains 329058 sequences. (Running on oeis4.)