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 A202260 #14 Feb 23 2015 23:06:27
%S A202260 4,6,8,9,40,42,44,45,46,48,49,60,62,63,64,65,66,68,69,80,81,82,84,85,
%T A202260 86,87,88,90,91,92,93,94,95,96,98,99,400,402,403,404,405,406,407,408,
%U A202260 420,422,423,424,425,426,427,428,429,440,441,442,444,445,446,447,448
%N A202260 Right-truncatable composites: every decimal prefix is a composite number.
%C A202260 Subsequence of A202259.
%H A202260 Stanislav Sykora, <a href="/A202260/b202260.txt">Table of n, a(n) for n = 1..10000</a>
%o A202260 (PARI) isComposite(n) = (n>2)&&(!isprime(n));
%o A202260 isRightTruncatableComposite(n,b=10) = {my(k=b);if(!isComposite(n),return(0););while(n\k>0,if(!isComposite(n\k),return(0););k*=b);return(1);} \\ _Stanislav Sykora_, Feb 15 2015
%Y A202260 Cf. A012883 (right-truncatable noncomposites), A202259 (right-truncatable nonprimes), A024770 (right-truncatable primes).
%Y A202260 Cf. A254750, A254752, A254754, A254755 (left-truncatable composites).
%K A202260 nonn,base
%O A202260 1,1
%A A202260 _Jaroslav Krizek_, Dec 25 2011