OFFSET
1,2
COMMENTS
Cody M. Haderlie (see A269304) conjectures that the trajectory of any initial value will eventually merge with this sequence. The trajectory of 2, for example, begins 2, 4, 7, 9, 13, 15, 19, 21, 25, ... and from 7 on coincides with this sequence. See A271418.
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..10000
PROG
(Python)
from __future__ import division
from sympy import primefactors
A270807_list, b = [], 1
for i in range(10000):
A270807_list.append(b)
b += b//(max(primefactors(b)+[1])) + 1 # Chai Wah Wu, Apr 06 2016
(PARI) gpf(n) = if (n==1, 1, vecmax(factor(n)[, 1]));
lista(nn) = {a = 1; for (n=1, nn, print1(a, ", "); a = a + a/gpf(a) + 1; ); } \\ Michel Marcus, Apr 06 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 05 2016
STATUS
approved