This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A239486 #5 Mar 20 2014 10:05:02 %S A239486 0,11,99,595,467778888888979888888877764 %N A239486 Smallest palindrome which has additive and multiplicative persistence n. %C A239486 The corresponding sequence made of palindromic primes begins with 2, 11, 12421, 757 and 746788887898878898788887647. %e A239486 a(595) since 595 is the smallest palindrome with additive persistence 3 (595 -> 19 -> 10 -> 1) and multiplicative persistence 3 (595 -> 225 -> 20 -> 0). %Y A239486 Cf. A031346, A003001, A031286, A006050, A201991, A239427. %K A239486 nonn,base %O A239486 0,2 %A A239486 _Giovanni Resta_, Mar 20 2014