OFFSET
1,3
COMMENTS
Records appear at: 1,3,5,9,17,30,52,75,127,202,329,598,969,1568,2538,4207.
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10000
EXAMPLE
a(4) != 1 or else {a(2), a(3)} = {1, 2} = {a(3), a(4)}, thereforea(4) = 2.
a(5) != 1 or else {a(1), a(2), a(3)} = {1, 2} = {a(3), a(4), a(5)},a(5) != 2 or else {a(3), a(4)} = {2} = {a(4), a(5)}, therefore a(5) != 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Kagey, May 01 2017
STATUS
approved