239768domain: NAppears in sequencesa(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026615.at n=7A026959Structured snub cubic numbers.at n=33A100150Number of primes of the form (x+1)^5 - x^5 less than 10^n.at n=27A221846