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 A301944 #22 Feb 24 2020 07:05:28 %S A301944 2,13,68,560,4418,35953,304340,2636531,23265760,208241341,1884492541 %N A301944 Number of primes of the form b^2 + 1 for b <= 10^n that end in 7. %F A301944 a(n) + A301943(n) + 2 = A206709(n). %e A301944 17, 37, 197, 257, 577, 677, 1297, 2917, 3137, 4357, 5477, 7057 and 8837 are primes; so a(2) = 13. %Y A301944 Cf. A002496, A206709, A301943. %K A301944 nonn,base,more %O A301944 1,1 %A A301944 _Seiichi Manyama_, Mar 29 2018 %E A301944 a(10)-a(11) from _Jinyuan Wang_, Feb 24 2020