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 A272654 #9 May 15 2016 11:29:52 %S A272654 11,1001,1010,1111,100001,100010,100100,101011,101101,101110,110011, %T A272654 110101,110110,111111,10000001,10000010,10000100,10001000,10010011, %U A272654 10010101,10010110,10011001,10011010,10011100,10100011,10100101,10100110,10101001,10101010,10101100 %N A272654 Binary words beginning with 1 which are abelian squares. %C A272654 Binary strings of the form uv, where u begins with 1 and v is some permutation of u. %H A272654 Chai Wah Wu, <a href="/A272654/b272654.txt">Table of n, a(n) for n = 1..10000</a> %o A272654 (Python) %o A272654 from sympy.utilities.iterables import multiset_permutations %o A272654 A272654_list = [int(b+''.join(s)) for b in (bin(n)[2:] for n in range(1,100)) for s in multiset_permutations(sorted(b))] # _Chai Wah Wu_, May 15 2016 %Y A272654 Cf. A272653, A272655. %K A272654 nonn,base %O A272654 1,1 %A A272654 _N. J. A. Sloane_, May 14 2016 %E A272654 More terms from _Chai Wah Wu_, May 15 2016