A179223 - OEIS

%I #2 Mar 31 2012 14:41:48

%S 1,2,3,4,5,9,10,8,25,343,3969,13090,73344,77398016

%N Iterative mapping with offset: a(1)=1, a(n)=A095904(a(n-1)-1).

%C a(15) is greater than 10^11 and of the form (p^10)(q^5)(r^2)(s^2)tu, where p, q, r, s, t and u are distinct primes.

%H Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>.

%Y Cf. A095904, A179224.

%K nonn

%O 1,2

%A _Will Nicholes_, Jul 10 2010