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 A284060 #5 Mar 19 2017 19:36:42 %S A284060 2,3,5,7,23,37,53,73,373,3137,3797 %N A284060 Primes that are left-, left/right-, and right-truncatable. %C A284060 Intersection of A020994 and A077390. Only the last three terms exhibit all three properties nontrivially. %e A284060 The prime 3797 is a term because it is a term of A024785 (truncating from the left: 797, 97, 7 are primes), of A077390 (truncating the same number of digits from left and from right: 79 is a prime), and of A024770 (truncating from the right: 379, 37, 3 are primes). The digit 9 is not a prime, so 3797 is not also a term of A085823. %Y A284060 Cf. A020994, A024770, A024785, A077390, A085823 (a subsequence). %K A284060 nonn,base,fini,full %O A284060 1,1 %A A284060 _Rick L. Shepherd_, Mar 19 2017