A091458 Denominators corresponding to A091457.

1, 2, 6, 66, 1650, 645414, 52975482882, 312802364749726356414

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Formula

Let 1 = 1/x_1 + ... + 1/x_{n-1} + p/q, where 1/x_1>=...>=1/x_{n-1}>=p/q and (p, q)=1. a(n) = q corresponding to maximal p (=A091457(n)) over all such expansions.

Example

a(7) = 52975482882 because 1 = 1/2 + 1/3 + 1/7 + 1/43 + 1/5413 + 1/5419 + 9770455/52975482882 and there is no expansion with larger numerator of the remainder.

Crossrefs

Cf. A091457, A000058.

Sequence in context: A082617 A006517 A217630 * A335934 A167006 A087331

Adjacent sequences: A091455 A091456 A091457 * A091459 A091460 A091461

Keyword

frac,hard,nonn,more

Author

Max Alekseyev, Jan 11 2004

Status

approved