99660domain: NAppears in sequencesa(n) = 10 + floor( (1 + Sum_{j=1..n-1} a(j) )/3 ).at n=32A120155Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=10A192431a(n) is the largest n-digit number whose last k digits are divisible by the k-th prime for k = 1..n.at n=4A211345