OFFSET
0,3
EXAMPLE
a(313)=9 because
313=31+282
313=41+272
313=61+252
313=71+242
313=101+212
313=269+44
313=307+6
313=311+2
313=313+0
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Jason Earls, May 30 2004
STATUS
approved