OFFSET
1,3
LINKS
F.M. van Lamoen, Spiral recurrence.
EXAMPLE
The spiral starts
749---646---286
/ \
/ \
1681 5-----3 250
/ / \ \
/ / \ \
1939 8 * 2 110
/ / / / /
/ / / / /
2059 10 1-----1 98
\ \ /
\ \ /
6428 23----33----42
CROSSREFS
KEYWORD
nonn,nice
AUTHOR
Floor van Lamoen, Jul 09 2001
STATUS
approved