a(0) = 0, and for n > 0, a(n) is the square of the product of first n-1 odd primes.

A369059

a(0) = 0, and for n > 0, a(n) is the square of the product of first n-1 odd primes.

Terms

    a(0) =0a(1) =1a(2) =9a(3) =225a(4) =11025a(5) =1334025a(6) =225450225a(7) =65155115025

External references