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 A023522 #13 Nov 22 2014 12:42:31 %S A023522 1,2,2,3,2,4,3,3,4,2,3,3,2,4,4,3,3,4,4,2,4,4,3,5,4,3,5,5,3,5,3,4,2,4, %T A023522 3,5,4,4,6,4,3,3,3,4,3,4,5,4,4,3,3,3,4,4,5,4,4,3,5,2,3,5,3,4,6,3,4,3, %U A023522 3,4,3,5,8,3,4,6,8,3,6 %N A023522 Sum of exponents in prime-power factorization of p(n)*p(n-1) - 1. %H A023522 Harvey P. Dale, <a href="/A023522/b023522.txt">Table of n, a(n) for n = 2..1000</a> %F A023522 a(n) = A001222(A023515(n)). - _Michel Marcus_, Sep 30 2013 %t A023522 PrimeOmega[Times@@#-1]&/@Partition[Prime[Range[80]],2,1] (* _Harvey P. Dale_, Nov 22 2014 *) %o A023522 (PARI) a(n) = bigomega(prime(n)*prime(n-1) - 1); \\ _Michel Marcus_, Sep 30 2013 %K A023522 nonn %O A023522 2,2 %A A023522 _Clark Kimberling_ %E A023522 Offset set to 2 and a(1) removed by _Michel Marcus_, Sep 30 2013