OFFSET
1,5
COMMENTS
LINKS
T. D. Noe, Table of n, a(n) for n=1..10000
EXAMPLE
The 11th Ulam number (26) is the sum of the 6th Ulam number (8) and the 10th Ulam number (18), so a(11)=8.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jud McCranie, Feb 15 2003
STATUS
approved