OFFSET
1,1
COMMENTS
LINKS
Hiroaki Yamanouchi, Table of n, a(n) for n = 1..100
EXAMPLE
3^2 - 1 = 8 = 2^3. 5 does not beat this record with 5^2 - 1 = 24 = 2^3 * 3.
7^2 - 1 = 48 = 2^4 * 3, so 7 sets the next record, which stands through 11 and 13.
17^2 - 1 = 288 = 2^5 * 3^2.
PROG
(PARI) lista(nn) = {r = 0; forprime (n=1, nn, v = valuation(n^2-1, 2); if (v > r, r = v; print1(n, ", "))); }
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, Dec 20 2013
EXTENSIONS
a(22)-a(28) from Hiroaki Yamanouchi, Sep 27 2014
STATUS
approved