OFFSET
1,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..8000
E. Angelini, Vertices, edges, primes and non-primes, SeqFan list, Sept. 16, 2015.
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler, Sep 16 2015
STATUS
approved