OFFSET
1,2
COMMENTS
If the functions counted are those whose sum of values is 0 mod 2 (instead of 0 mod 3) it appears that we get A057065.
It appears that a(n) = floor((n^n)/3) for n>2.
This conjecture is false for n=8, n=14, and n=20. - Sean A. Irvine, Feb 26 2024
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Mar 13 2002
EXTENSIONS
a(9)-a(20) from Sean A. Irvine, Feb 26 2024
STATUS
approved