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 A229905 #8 Dec 23 2013 12:42:25 %S A229905 0,1,1,2,4,10,30,26,78,156,278,722,1827,3140,7800,5810,21016,40260, %T A229905 76104,173836,394492,520775,1376090,3080882,6887040,12734023,28266044, %U A229905 44217698,114969792,211934801,464129402,354151217,1360414116,2644465928,5134476403 %N A229905 Number of binary words of length n with exactly one occurrence of the subword given by the binary expansion of n. %H A229905 Alois P. Heinz, <a href="/A229905/b229905.txt">Table of n, a(n) for n = 0..1000</a> %e A229905 a(1) = 1: 1. %e A229905 a(2) = 1: 10. %e A229905 a(3) = 2: 011, 110. %e A229905 a(4) = 4: 0100, 1000, 1001, 1100. %e A229905 a(5) = 10: 00101, 01010, 01011, 01101, 10100, 10110, 10111, 11010, 11011, 11101. %Y A229905 Column k=1 of A233940. %K A229905 nonn %O A229905 0,4 %A A229905 _Alois P. Heinz_, Dec 19 2013