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 A255646 #10 Aug 30 2017 02:47:36 %S A255646 7,5,3,5,9,5,7,5,7,3,5,1,5,5,7,1,5,5,1,3,5,9,5,5,3,3,5,7,3,9,5,7,9,3, %T A255646 5,9,5,5,5,5,7,3,7,1,9,9,5,1,5,5,3,5,9,5,7,7,9,5,1,7,3,5,5,1,5,5,1,7, %U A255646 9,5,7,5,1,5,3,5,7,1,7,3,5,7,3,9,5,5 %N A255646 Odd triprimes modulo 10. %C A255646 Final digits of odd triprimes; %C A255646 a(n) = A046316(n) mod 10. %H A255646 Reinhard Zumkeller, <a href="/A255646/b255646.txt">Table of n, a(n) for n = 1..10000</a> %H A255646 <a href="/index/Fi#final">Index entries for sequences related to final digits of numbers</a> %o A255646 (Haskell) %o A255646 a255646 = flip mod 10 . a046316 %o A255646 (PARI) do(x)=my(v=List(), t); forprime(p=3, x\9, forprime(q=3, min(x\(3*p), p), t=p*q; forprime(r=3, min(x\t, q), listput(v, t*r)))); Set(v)%10 \\ %Y A255646 Cf. A046316, subsequence of A253721. %K A255646 nonn %O A255646 1,1 %A A255646 _Reinhard Zumkeller_, May 05 2015