A369242 Number of representations of n! - 1 as a sum (p*q + p*r + q*r) with three odd primes p <= q <= r.

0, 0, 0, 0, 0, 2, 1, 3, 11, 24, 53, 176, 339, 1510, 2573

Offset: 0

Author

Antti Karttunen, Jan 21 2024

Keywords

• nonn
• hard
• more

Crossrefs

Cf. A033312, A369054.

Cf. also A369241, A369245.

Programs

PARI

A369242(n) = A369054(n!-1); \\ Uses also the program given in A369054.

Formula

a(n) = A369054(A033312(n)).

For n >= 4, a(n) = A369055(n!/4).