OFFSET
1,2
COMMENTS
Numbers n such that A102448(n) >= 1.
All positive squares x^2 are in the sequence with j = 1, k = x.
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000
EXAMPLE
180 is in the sequence with j = 5, k = 6.
PROG
(PARI) is(n) = {my(f = factor(n), podd = 1, peven = 1); for(i = 1, #f~, if(bittest(f[i, 2], 0), podd *= f[i, 1]^f[i, 2] , peven *= f[i, 1]^(f[i, 2] >> 1) ) ); podd <= peven } \\ David A. Corneth, Nov 11 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Feb 25 2005
EXTENSIONS
Edited by David W. Wilson, Sep 03 2005
STATUS
approved