[seqfan] Observation on A008328 and A205901
Jeremy Gardiner
jeremy.gardiner at btinternet.com
Fri Jan 12 22:46:23 CET 2018
It appears that run lengths of zeros in the parity of A008328 gives A205901.
Checked for the 10,000 terms of A008328 given in the b-file.
Parity of A008328
(Number of divisors of p-1, p prime):
1,0,1,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,1,0,0,0,0,...
A205901
(Number of primes between two consecutive primes of the form n^2 + 1):
1, 3, 4, 13, 18, 9, 23, ...
Jeremy Gardiner
More information about the SeqFan
mailing list