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 A143536 #5 Mar 21 2014 17:33:43 %S A143536 0,1,1,1,1,1,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1,0,0,0,0,0,0, %T A143536 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0, %U A143536 0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1 %N A143536 Triangle read by rows, T(n,k) = 1 if n is prime, 0 otherwise. %C A143536 Row sums = A061397: (0, 2, 3, 0, 5, 0, 7,...). %H A143536 Reinhard Zumkeller, <a href="/A143536/b143536.txt">Rows n = 1..125 of table, flattened</a> %F A143536 Triangle read by rows, T(n,k) = 1 if n is prime, 0 otherwise. Mobius transform (A054525) of triangle A143535. %e A143536 First few rows of the triangle = %e A143536 0; %e A143536 1, 1; %e A143536 1, 1, 1; %e A143536 0, 0, 0, 0; %e A143536 1, 1, 1, 1, 1; %e A143536 0, 0, 0, 0, 0, 0; %e A143536 1, 1, 1, 1, 1, 1, 1; %e A143536 ... %o A143536 (Haskell) %o A143536 a143536 n k = a143536_tabl !! (n-1) !! (k-1) %o A143536 a143536_row n = a143536_tabl !! (n-1) %o A143536 a143536_tabl = zipWith take [1..] $ map repeat a010051_list %o A143536 -- _Reinhard Zumkeller_, Mar 21 2014 %Y A143536 Cf. A143535, A061397. %Y A143536 Cf. A010051. %K A143536 nonn,tabl %O A143536 1,1 %A A143536 _Gary W. Adamson_, Aug 23 2008