OFFSET

2,2

EXAMPLE

a(2) = 1: The only representable integer is 5 = (2 + 1/3) * (2 + 1/7).

a(3) = 2: 9 and 11 can be represented; 9 = (2 + 1/9) * (2 + 1/13) * (2 + 1/19) and 10 other ways; 11 = (2 + 1/3)*(2 + 1/5)*(2 + 1/7) = (2 + 1/3)^2 * (2 + 1/49).

PROG

(PARI) see link in A355626.

CROSSREFS

KEYWORD

nonn,hard,more

AUTHOR

Hugo Pfoertner and Markus Sigg, Jul 16 2022

STATUS

approved