62883domain: NAppears in sequencesa(n) = (1/2)*(n^4 + 11*n^3 + 53*n^2 + 97*n + 54).at n=17A129026Numbers k such that A003415(k) == A276085(k) (mod 5^5), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.at n=25A391865