27 Jan
2007
27 Jan
'07
10:26 p.m.
Mathfunners, Seqfans:
... Let f(x) = x^2 + x, let g[0] be a positive integer, and for n = 1, 2, 3, ..., let g[n] = f(g[n-1]). ...
The case of g[0] = 1 ... which primes appear as factors in the sequence of g[n] ... 2, 3, 7, 13, 43, 73, 139, 181, 547, 607, 1033, 1171, ...
It is, of course, Sloane's A007996... I mean A096263... Augggh! yet another duplicate. It's an easy exercise to prove those sequences are identical. Good luck, reader. -- Don Reble djr@nk.ca -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.