OFFSET
1,36
LINKS
EXAMPLE
a(36) = 2; there are 2 partitions of 36 into two products-of-three-primes: (28,8) and (18,18).
MAPLE
MATHEMATICA
Table[Sum[Floor[PrimeOmega[i]/3] Floor[3/PrimeOmega[i]] Floor[3/PrimeOmega[n - i]] Floor[PrimeOmega[n - i]/3], {i, 2, Floor[n/2]}], {n, 1, 90}] (* Indranil Ghosh, Mar 09 2017, translated from Maple code *)
PROG
(PARI) for(n=1, 90, print1(sum(i=2, floor(n/2), floor(bigomega(i)/3) * floor(3/bigomega(i)) * floor(3/bigomega(n - i)) * floor(bigomega(n - i)/3)), ", ")) \\ Indranil Ghosh, Mar 09 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Jan 08 2017
STATUS
approved