A270808 First differences of A270807, divided by 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

Links

Chai Wah Wu, Table of n, a(n) for n = 0..10000

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

Adjacent sequences: A270805 A270806 A270807 * A270809 A270810 A270811

Keyword

nonn

Author

N. J. A. Sloane, Apr 05 2016

Status

approved