%I #11 Oct 02 2014 23:01:16
%S 2,3,7,23,89,389,2297,13903,82829,508847
%N a(n) is the largest integer that makes A237354(a(n))=n.
%C a(0)-a(7) are primes, while a(8) = 113*733. Probably, a(9) = 508847 and a(10) = 3699977. - _Giovanni Resta_, Feb 23 2014
%C Probably, a(11) = 28644529 and a(12) = 235037603. - _Hiroaki Yamanouchi_, Oct 02 2014
%e A237354(2)=0 and this is the only 0 in A237354. So a(0)=2;
%e A237354(3)=1 and this is the only 1 in A237354. So a(1)=3;
%e A237354(4,5,6,7)=2, the largest one is A237354(7). So a(2)=7;
%e There are 10 numbers between (include) 8 and 23 that make A237354(n)=3. The largest one is 23. There is no more A237354(n)=3 checked up to n=2*3*5+1=31. So a(3)=23;
%e Checked up to n=2*3*5*7+1=211, we got a(4)=89;
%e Checked up to n=2*3*5*7*11+1=2311, we got a(5)=389;
%e Checked up to n=2*3*5*7*11*13+1=30031, we got a(6)=2297;
%Y Cf. A237354.
%K nonn,hard,more
%O 0,1
%A _Lei Zhou_, Feb 06 2014
%E a(8) from _Giovanni Resta_, Feb 23 2014
%E a(9) from _Hiroaki Yamanouchi_, Oct 02 2014