147528domain: NAppears in sequencesConvolution of Fibonacci numbers and primes.at n=20A023615Expansion of x^2*(1-x)*(x^2+x+1)*(x^6+x^3+1)/((2*x-1)*(2*x^9-x^6+x^3-1)).at n=19A111662Number of 3 X 3 semimagic squares with distinct positive values and magic sum n.at n=27A173547