OFFSET
0,4
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..136
Eric Weisstein's World of Mathematics, Nonaveraging Sequence
Wikipedia, Arithmetic progression
Wikipedia, Iverson bracket
Wikipedia, Salem-Spencer set
FORMULA
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 14 2020
STATUS
approved