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 A077534 #16 Jul 16 2022 13:18:12 %S A077534 32,52,72,232,252,272,332,352,372,532,552,572,732,752,772,2232,2252, %T A077534 2272,2332,2352,2372,2532,2552,2572,2732,2752,2772,3232,3252,3272, %U A077534 3332,3352,3372,3532,3552,3572,3732,3752,3772,5232,5252,5272,5332,5352,5372 %N A077534 Multiples of 4 using only prime digits (2, 3, 5 and 7). %C A077534 Last digit is 2, next-to-last digit is odd, each remaining digit can be any prime digit. %t A077534 Select[4Range[2000],And@@PrimeQ[IntegerDigits[#]]&] (* _Harvey P. Dale_, Dec 13 2010 *) %Y A077534 Cf. A077533. %K A077534 base,nonn %O A077534 1,1 %A A077534 _Amarnath Murthy_, Nov 08 2002 %E A077534 Corrected and extended by _Sascha Kurz_, Jan 03 2003