A290092 Filter based on 2-digits of base-3 expansion: a(n) = A278222(A289814(n)).

1, 1, 2, 1, 1, 2, 2, 2, 4, 1, 1, 2, 1, 1, 2, 2, 2, 4, 2, 2, 6, 2, 2, 6, 4, 4, 8, 1, 1, 2, 1, 1, 2, 2, 2, 4, 1, 1, 2, 1, 1, 2, 2, 2, 4, 2, 2, 6, 2, 2, 6, 4, 4, 8, 2, 2, 6, 2, 2, 6, 6, 6, 12, 2, 2, 6, 2, 2, 6, 6, 6, 12, 4, 4, 12, 4, 4, 12, 8, 8, 16, 1, 1, 2, 1, 1, 2, 2, 2, 4, 1, 1, 2, 1, 1, 2, 2, 2, 4, 2, 2, 6, 2, 2, 6, 4, 4, 8, 1, 1, 2, 1

Offset: 0

Author

Antti Karttunen, Jul 25 2017

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 0..19683

Crossrefs

Cf. A278222, A289814, A290091, A290093.

Programs

Scheme

(define (A290092 n) (A278222 (A289814 n)))

Formula

a(n) = A278222(A289814(n)).