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 A076769 #9 Sep 18 2024 14:57:40
%S A076769 8,9,13,18,20,23,27,33,34,38,41,43,47,48,58,60,62,63,68,69,73,76,83,
%T A076769 86,88,89,90,93,97,98,99,108,111,112,113,118,123,125,132,133,134,135,
%U A076769 138,139,143,144,146,148,151,158,160,163,164,167,168,173,174,177,181,182
%N A076769 Integers not expressible as the sum of a positive triangular number and a square.
%o A076769 (PARI) isok(n)={for(k=1, sqrtint(2*n), if(issquare(n-binomial(k+1,2)), return(0))); 1} \\ _Andrew Howroyd_, Sep 18 2024
%Y A076769 Cf. A000217, A000290, A014134.
%K A076769 nonn
%O A076769 1,1
%A A076769 _Jason Earls_, Nov 14 2002
%E A076769 Name clarified and offset changed by _Andrew Howroyd_, Sep 18 2024