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 A115176 #4 Mar 11 2016 23:43:25 %S A115176 256,384,872,1224,1512,1728,2661,2675,2824,3528,4656,5150,5224,6016, %T A115176 6024,6336,6592,6840,7193,7528,7560,7664,8016,8456,8512,8952,8968, %U A115176 9072,9696,9796,10032,10300,10440,10624,11000,11184,11208,11256,11640,11880 %N A115176 Positive numbers that are not the sum of two squares and a positive Fibonacci number. %C A115176 There are 2142682 such numbers up to 10^9, the last one in this range being 999999456. %o A115176 (PARI) isA001481(n)=#bnfisintnorm(bnfinit(z^2+1), n) %o A115176 is(n)=my(k=1,f); while((f=fibonacci(k++))<=n, if(isA001481(n-f), return(0))); 1 \\ _Charles R Greathouse IV_, Mar 11 2016 %Y A115176 Cf. A115171, A115172, A115173, A115174, A115175, A115177. %K A115176 nonn %O A115176 1,1 %A A115176 _Giovanni Resta_, Jan 15 2006