# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a181591 Showing 1-1 of 1 %I A181591 #19 Jul 10 2022 09:43:46 %S A181591 1,1,1,2,1,1,1,3,2,1,1,3,1,1,1,4,1,3,1,3,1,1,1,6,2,1,3,3,1,1,1,5,1,1, %T A181591 1,6,1,1,1,6,1,1,1,3,3,1,1,10,2,3,1,3,1,6,1,6,1,1,1,4,1,1,3,6,1,1,1,3, %U A181591 1,1,1,10,1,1,3,3,1,1,1,10,4,1,1,4,1,1,1,6,1,4,1,3,1,1,1,15,1,3,3,6 %N A181591 a(n) = binomial(bigOmega(n),omega(n)), where omega = A001221 and bigOmega = A001222. %H A181591 Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 %H A181591 Index entries for sequences computed from exponents in factorization of n %F A181591 a(n) = A007318(A001222(n),A001221(n)). %F A181591 a(n) = A088529(n) = A136565(n) for 2 <= n < 24. %F A181591 a(n) = A136277(A156552(n)). - _Antti Karttunen_, May 29 2017 %t A181591 a[n_] := Binomial[PrimeOmega[n], PrimeNu[n]]; Table[a[n], {n, 1, 100}] (* _Jean-François Alcover_, Jun 29 2013 *) %o A181591 (PARI) a(n) = binomial(bigomega(n), omega(n)); \\ _Michel Marcus_, Jul 10 2022 %Y A181591 Cf. A001221, A001222, A007318, A136277. %Y A181591 Cf. A088529, A136565 (equal for n = 2..23). %K A181591 nonn %O A181591 1,4 %A A181591 _Reinhard Zumkeller_, Nov 01 2010 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE