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 A145850 #8 Dec 15 2018 22:29:54
%S A145850 1,17,65,81,257,273,321,337,1025,1041,1089,1105,1281,1297,1345,1361,
%T A145850 4097,4113,4161,4177,4353,4369,4417,4433,5121,5137,5185,5201,5377,
%U A145850 5393,5441,5457,16385,16401,16449,16465,16641,16657,16705,16721,17409,17425,17473,17489,17665,17681
%N A145850 a(n) = A145818(2n-1).
%C A145850 Every positive odd integer m == 3 (mod 16) is a unique sum of the form a(s) + 2a(t), while other odd integers are not expressible in such form.
%F A145850 If f(x) = Sum_{n>=1} x^a(n), abs(x) < 1, then f(x)*f(x^2) = x^3/(1-x^16).
%Y A145850 Bisection of A145818.
%Y A145850 Cf. A145812, A145849.
%K A145850 nonn
%O A145850 1,2
%A A145850 _Vladimir Shevelev_, Oct 21 2008
%E A145850 More terms from _Michel Marcus_, Dec 15 2018