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 A133758 #16 Feb 16 2025 08:33:06 %S A133758 0,3,5,4,149,7,144,37,1442 %N A133758 Total number of restricted left truncatable primes in base n. %C A133758 Prime digits p in base n are counted if there is no prime with 2 digits which can have its leftmost digit removed to produce p; e.g., in base 10 the prime digits 2 and 5 are counted, because there are no primes containing them as rightmost digit. %D A133758 Steven Kahan; Sol Weintraub: Left truncatable primes. In: Journal of recreational mathematics 29 (1998), pp. 254-264. %H A133758 I. O. Angell and H. J. Godwin, <a href="http://dx.doi.org/10.1090/S0025-5718-1977-0427213-2">On Truncatable Primes</a>, Math. Comput. 31, 265-267, 1977. %H A133758 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TruncatablePrime.html">Truncatable Prime</a> %H A133758 Chai Wah Wu, <a href="http://arxiv.org/abs/1503.08883">On a conjecture regarding primality of numbers constructed from prepending and appending identical digits</a>, arXiv:1503.08883 [math.NT], 2015. %H A133758 <a href="/index/Tri#tprime">Index entries for sequences related to truncatable primes</a> %Y A133758 Cf. A076623, A055521. %K A133758 nonn %O A133758 2,2 %A A133758 _Martin Renner_, Jan 04 2008