A376246 a(n) is the numerator of Sum_{k = 1..n} 1 / (A376244(k) * A376245(k)).

1, 7, 47, 109, 823, 4757, 7582661, 3026164178509, 277505140475561534945603, 260165888480949800316206335248860247693882947, 1735545885361077128120249087863835952607412447268583818069629193850545735375261166814107

Offset

1,2

Links

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

Rémy Sigrist, PARI program

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A376244, A376245, A376247.

Sequence in context: A067658 A044490 A139916 * A009219 A348394 A158713

Adjacent sequences: A376243 A376244 A376245 * A376247 A376248 A376249

Keyword

nonn,frac

Author

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

Status

approved