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 A218347 #8 Oct 29 2012 05:36:20 %S A218347 0,1,2,4,5,8,27,28,31,54,256,257,260,283,512,3125,3126,3129,3152,3381, %T A218347 6250,46656,46657,46660,46683,46912,49781,93312,823543,823544,823547, %U A218347 823570,823799,826668,870199,1647086,16777216,16777217,16777220,16777243,16777472,16780341 %N A218347 Numbers of the form a^a + b^b, a>=b>=0. %C A218347 The subsequence of primes is A068145. %Y A218347 Cf. A000312, A066846, A068145, A218346. %K A218347 nonn %O A218347 1,3 %A A218347 _Alex Ratushnyak_, Oct 26 2012