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 A258208 #9 Aug 02 2015 17:52:58 %S A258208 1,1,3,1,3,5,1,3,7,7,1,3,7,9,9,1,3,7,9,13,11,1,3,7,9,13,15,13,1,3,7,9, %T A258208 13,15,19,15,1,3,7,9,13,15,21,21,17,1,3,7,9,13,15,21,25,25,19,1,3,7,9, %U A258208 13,15,21,25,27,27,21,1,3,7,9,13,15,21,25,31,31,31,23,1,3,7,9,13,15,21,25,31,33,33,33,25,1,3,7,9,13,15,21,25,31,33,37,37,37,27,1,3,7,9,13,15,21,25,31,33,37,43,43,39,29 %N A258208 Transpose of array A258207 which gives the numbers remaining after the stage n of Lucky sieve. %C A258208 See comments in A258207. %H A258208 <a href="/index/Si#sieve">Index entries for sequences generated by sieves</a> %e A258208 The top left corner of the array: %e A258208 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 %e A258208 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 %e A258208 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7 %e A258208 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 %e A258208 9, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13 %e A258208 11, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 %e A258208 13, 19, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21 %e A258208 15, 21, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25 %e A258208 17, 25, 27, 31, 31, 31, 31, 31, 31, 31, 31, 31 %e A258208 19, 27, 31, 33, 33, 33, 33, 33, 33, 33, 33, 33 %e A258208 21, 31, 33, 37, 37, 37, 37, 37, 37, 37, 37, 37 %e A258208 23, 33, 37, 43, 43, 43, 43, 43, 43, 43, 43, 43 %e A258208 ... %o A258208 (Scheme) %o A258208 (define (A258208 n) (A258207bi (A004736 n) (A002260 n))) %o A258208 ;; Other code as in A258207. %Y A258208 Transpose of A258207. %Y A258208 Main diagonal: A000959 (the Lucky numbers). %K A258208 nonn,tabl %O A258208 1,3 %A A258208 _Antti Karttunen_, Jul 27 2015