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A098242 Numbers n such that GCD(2n+1, numerator(Bernoulli(4n+2))) is not squarefree. 1
12, 24, 37, 60, 62, 84, 87, 112, 122, 137, 144, 162, 171, 180, 181, 187, 212, 237, 253, 262, 264, 269, 287, 312, 318, 337, 362, 387, 412, 416, 420, 422, 423, 433, 437, 462, 465, 480, 487, 512, 537, 541, 544, 562, 563, 587, 591, 612, 637, 662, 665, 684, 687 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

PROG

(PARI) for(n=1, 3000, if(!issquarefree(gcd(2*n+1, numerator(bernfrac(4*n+2)))), print1(n", ")))

CROSSREFS

Complement of A098240. Cf. A067778, A097704.

Sequence in context: A022759 A091193 A174018 * A139406 A140831 A126855

Adjacent sequences:  A098239 A098240 A098241 * A098243 A098244 A098245

KEYWORD

nonn

AUTHOR

Ralf Stephan, Sep 01 2004

STATUS

approved

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Last modified August 15 09:12 EDT 2018. Contains 313756 sequences. (Running on oeis4.)