0,6

The first five terms of this sequence correspond to Fermat primes.

a(5)=1806390369 because 1806390369 is the smallest number m such that

m^2^k+(m+1)^2^k is prime for k=0,1,2,3,4 and 5.

Cf. A090872, A090873, A019434, A000215.

Adjacent sequences: A090871 A090872 A090873 this_sequence A090875 A090876 A090877

Sequence in context: A147769 A129616 A105006 this_sequence A071371 A052094 A015429

nonn

Farideh Firoozbakht (f.firoozbakht(AT)sci.ui.ac.ir), Feb 06 2004