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 A167843 #10 Aug 03 2022 18:36:33 %S A167843 113,127,137,139,149,157,167,179,199,211,223,227,229,233,239,257,269, %T A167843 277,311,331,337,347,349,359,367,379,389,421,431,433,443,449,457,467, %U A167843 479,499,521,541,557,569,577,599,631,641,643,653,661,677,733,743,751,761 %N A167843 Obtuse-angled primes. %C A167843 Primes in A135603. %C A167843 Primes whose structure of digits represents an obtuse angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. %H A167843 Michael S. Branicky, <a href="/A167843/b167843.txt">Table of n, a(n) for n = 1..914</a> %o A167843 (Python) # uses agen() from A135603 %o A167843 from sympy import isprime %o A167843 g = filter(isprime, agen()) %o A167843 print([next(g) for n in range(1, 53)]) # _Michael S. Branicky_, Aug 03 2022 %Y A167843 Cf. A134811, A134951, A134971, A135603, A167841, A167842, A167844, A167845, A167846, A167853. %K A167843 base,nonn %O A167843 1,1 %A A167843 _Omar E. Pol_, Nov 13 2009 %E A167843 a(12) and beyond from _Michael S. Branicky_, Aug 03 2022