A376247 a(n) is the denominator of Sum_{k = 1..n} 1 / (A376244(k) * A376245(k)).

3, 12, 60, 120, 840, 4760, 7582680, 3026164178520, 277505140475561534945640, 260165888480949800316206335248860247693882960, 1735545885361077128120249087863835952607412447268583818069629193850545735375261166814160

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Rémy Sigrist, PARI program

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A376244, A376245, A376246.

Sequence in context: A114419 A090830 A233283 * A127918 A069944 A253171

Adjacent sequences: A376244 A376245 A376246 * A376248 A376249 A376250

Keyword

nonn,frac

Author

Rémy Sigrist and N. J. A. Sloane, Sep 16 2024

Status

approved