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A270808
First differences of A270807, divided by 2.
2
1, 1, 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 1, 5, 3, 1, 5, 1, 8, 4, 5, 1, 2, 3, 6, 4, 2, 3, 1, 5, 1, 8, 1, 2, 6, 1, 2, 3, 1, 2, 4, 23, 1, 11, 3, 4, 2, 1, 23, 10, 2, 18, 1, 5, 1, 8, 6, 1, 8, 7, 23, 1, 2, 1, 5, 7, 2, 1, 2, 6, 18, 1, 2, 25, 2, 1, 32, 1, 17, 7, 2, 1, 2, 10, 14, 3, 7, 8
OFFSET
0,5
PROG
(Python)
from __future__ import division
from sympy import primefactors
A270808_list, a = [], 1
for i in range(10001):
b = a//(max(primefactors(a)+[1])) + 1
A270808_list.append(b//2)
a += b # Chai Wah Wu, Apr 06 2016
CROSSREFS
Cf. A270807.
Sequence in context: A324884 A067815 A133780 * A290532 A080237 A136109
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 05 2016
STATUS
approved