A290091 Filter based on 1-digits of base-3 expansion: a(n) = A278222(A289813(n)).

1, 2, 1, 2, 4, 2, 1, 2, 1, 2, 6, 2, 4, 8, 4, 2, 6, 2, 1, 2, 1, 2, 4, 2, 1, 2, 1, 2, 6, 2, 6, 12, 6, 2, 6, 2, 4, 12, 4, 8, 16, 8, 4, 12, 4, 2, 6, 2, 6, 12, 6, 2, 6, 2, 1, 2, 1, 2, 4, 2, 1, 2, 1, 2, 6, 2, 4, 8, 4, 2, 6, 2, 1, 2, 1, 2, 4, 2, 1, 2, 1, 2, 6, 2, 6, 12, 6, 2, 6, 2, 6, 30, 6, 12, 24, 12, 6, 30, 6, 2, 6, 2, 6, 12, 6, 2

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, A289813, A290092, A290093.

Programs

Scheme

(define (A290091 n) (A278222 (A289813 n)))