OFFSET
1,1
COMMENTS
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
EXAMPLE
n | a(n) | a(n)+1
--+-------------------------+-------------------------
1 | 7314 = 2 * 3 * 23 * 53 | 7315 = 5 * 7 * 11 * 19
2 | 8294 = 2 * 11 * 13 * 29 | 8295 = 3 * 5 * 7 * 79
3 | 8645 = 5 * 7 * 13 * 19 | 8646 = 2 * 3 * 11 * 131
PROG
(PARI) is(n) = omega(n)==4 && omega(n+1)==4 && bigomega(n)==4 && bigomega(n+1)==4 \\ Felix Fröhlich, Sep 05 2018
(PARI) is(n) = factor(n)[, 2]~ == [1, 1, 1, 1] && factor(n+1)[, 2]~ == [1, 1, 1, 1] \\ David A. Corneth, Sep 06 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 05 2018
STATUS
approved