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 A193769 #12 Jan 06 2013 14:47:12 %S A193769 1,2,3,4,5,7,13,14,14,16,17,26,41,43,53,63,64,67,76,103,122,124,134, %T A193769 184,313,314,317,326,353,365,367,377,427,434,677,1094,1096,1106,1156, %U A193769 1406,1563,1564,1567,1576,1603,1684,1927,2656 %N A193769 Numbers of the form (3^a+5^b)/2 ; a,b >= 0 (with repetition). %C A193769 Elements of the table A193770 (motivated by the less fundamental A081458), sorted by increasing size. %C A193769 The value 14 = (3^1+5^2)/2 = (3^3+5^0)/2, therefore it occurs twice. %o A193769 (PARI) select( t->t<3000, vecsort(concat(Vec( matrix(9,6,x,y,(3^(x-1)+5^(y-1))/2 ))))) %Y A193769 Cf. A193770 (the table), A081458 (the subtable obtained for even a,b). %K A193769 nonn %O A193769 1,2 %A A193769 _M. F. Hasler_, Jan 01 2013