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 A068903 #11 Apr 23 2017 01:00:24 %S A068903 1,2,2,3,2,6,2,4,3,6,2,15,2,6,6,5,2,15,2,15,6,6,2,28,3,6,4,15,2,56,2, %T A068903 6,6,6,6,36,2,6,6,28,2,56,2,15,15,6,2,45,3,15,6,15,2,28,6,28,6,6,2, %U A068903 220,2,6,15,7,6,56,2,15,6,56,2,66,2,6,15,15,6,56 %N A068903 Binomial(tau(n),omega(n)), where tau(n) is the number of divisors of n (A000005) and omega the number of distinct prime factors (A001221). %H A068903 G. C. Greubel, <a href="/A068903/b068903.txt">Table of n, a(n) for n = 1..1000</a> %t A068903 Table[Binomial[DivisorSigma[0,n],PrimeNu[n]],{n,100}] (* _Harvey P. Dale_, Oct 17 2016 *) %o A068903 (PARI) a(n) = binomial(numdiv(n), omega(n)); \\ _Michel Marcus_, Apr 23 2017 %Y A068903 Cf. A068904, A068905. %K A068903 nonn %O A068903 1,2 %A A068903 _Reinhard Zumkeller_, Mar 06 2002 %E A068903 More terms from _Harvey P. Dale_, Oct 17 2016