79102domain: NAppears in sequencesSpiro-tetranacci numbers: a(n) = sum of four previous terms that are nearest when terms arranged in a spiral.at n=29A092369G.f. = b(4)*b(6)/(x^8+x^6-x^5-x^3+x^2-2*x+1), where b(k) = (1-x^k)/(1-x).at n=17A266371