A156352 a(n)=A078649(A054353(n)-n+1)-A054353(n).

1, 1, 3, 2, 1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 3, 2, 1, 1, 2, 1, 3, 2, 1, 2, 1, 1, 3, 2, 1, 3, 2, 1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 2, 1, 1, 2, 1, 3, 2, 1, 3, 2, 1, 1, 2, 1, 1, 3, 2, 1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 3, 2, 1, 2, 1, 1, 2, 1, 3, 2, 1, 1, 2, 1, 1, 3, 2, 1, 2, 1, 1, 2, 1, 1, 3, 2, 1, 3, 2, 1, 1, 2, 1, 3, 2, 1, 2

Offset: 1

Author

Benoit Cloitre, Feb 08 2009

Keywords

• nonn

Formula

a(n)=3 iff {A000002(n),A000002(n+1),A000002(n+2)}={2,1,1}