OFFSET
0,4
COMMENTS
There are no self-conjugate partitions of 2, so we set a(2)=0.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..65537
FORMULA
a(0)=a(2)=0; a(n^2)=1; a(4n+2)=3 for n>0; a(n)=2 in all other cases.
MATHEMATICA
a[0]=a[2]=0; a[n_] := Which[IntegerQ[Sqrt[n]], 1, Mod[n, 4]==2, 3, True, 2]
PROG
(PARI) A067694(n) = if((2==n)||!n, 0, if(2==(n%4), 3, if(issquare(n), 1, 2))); \\ Antti Karttunen, Sep 27 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Naohiro Nomoto, Feb 05 2002
EXTENSIONS
Edited by Dean Hickerson, Feb 15 2002
STATUS
approved