64746domain: NAppears in sequencesPalindromes expressible as the sum of 2 consecutive palindromic primes.at n=14A046490Lenny Conundrum #168: Neopet species in alphabetical order, converted to digits by the phone keypad code.at n=36A119568a(n) = Sum_{k=1..n-1} sigma_2(k) * sigma_3(n-k).at n=11A376290