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A369247
Number of representations of 3*A057588(n) as a sum (p*q + p*r + q*r) with three odd primes p <= q <= r, where A057588 is Kummer numbers, one less than primorials.
3
0, 0, 1, 3, 2, 6, 10, 12, 50, 178, 150
OFFSET
1,4
FORMULA
a(n) = A369054(3*(A002110(n)-1)).
PROG
(PARI)
\\ Needs also program from A369054:
A002110(n) = prod(i=1, n, prime(i));
A369247(n) = A369054(3*(A002110(n)-1));
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Antti Karttunen, Jan 22 2024
STATUS
approved