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 A275157 #13 Nov 24 2016 09:45:21
%S A275157 1,2,3,4,6,7,8,10,12,13,14,15,16,19,23,25,27,28,34,35,36,37,44,48,50,
%T A275157 53,55,60,62,63,66,67,68,69,83,87,91,93,95,100,103,106,108,110,111,
%U A275157 113,115,120,123,126,127,130,131,132,133,134,156,165,176,181,185
%N A275157 Index when the partial tiling described in A275152 is perfect (i.e., all filled squares are contiguous).
%H A275157 Rémy Sigrist, <a href="/A275157/b275157.txt">Table of n, a(n) for n = 1..2500</a>
%e A275157 The following table depicts the first partial tilings described in A275152 ("X" denotes a filled square); perfect tilings are marked as such:
%e A275157 Index Perfect ? Partial tiling described in A275152
%e A275157 ----- --------- -----------------------------------
%e A275157 1 * X
%e A275157 2 * XX
%e A275157 3 * XXXX
%e A275157 4 * XXXXX
%e A275157 5 XXXXXX X
%e A275157 6 * XXXXXXXX
%e A275157 7 * XXXXXXXXXX
%e A275157 8 * XXXXXXXXXXXXX
%e A275157 9 XXXXXXXXXXXXXX X
%e A275157 10 * XXXXXXXXXXXXXXXXXX
%e A275157 11 XXXXXXXXXXXXXXXXXXX X
%e A275157 12 * XXXXXXXXXXXXXXXXXXXXXXX
%e A275157 13 * XXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 14 * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 15 * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 16 * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 17 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X
%e A275157 18 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XX
%e A275157 19 * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 20 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X
%e A275157 21 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X
%e A275157 22 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XX
%e A275157 23 * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
%e A275157 24 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X
%e A275157 25 * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
%Y A275157 Cf. A275152.
%K A275157 nonn
%O A275157 1,2
%A A275157 _Rémy Sigrist_, Nov 13 2016