A266188 a(n) = A004001(A087686(n)).

1, 1, 2, 4, 4, 7, 8, 8, 8, 12, 14, 15, 15, 16, 16, 16, 16, 21, 24, 26, 27, 27, 29, 30, 30, 31, 31, 31, 32, 32, 32, 32, 32, 38, 42, 45, 47, 48, 48, 51, 53, 54, 54, 56, 57, 57, 58, 58, 58, 60, 61, 61, 62, 62, 62, 63, 63, 63, 63, 64, 64, 64, 64, 64, 64, 71, 76, 80, 83, 85, 86, 86, 90, 93, 95, 96, 96, 99, 101, 102, 102, 104

Offset: 1

Author

Antti Karttunen, Jan 10 2016

Keywords

• nonn

Comments

Discarding duplicates gives A087686 back, i.e., this set of numbers is closed with respect to A004001.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A004001, A080677, A087686.

Programs

Scheme

(define (A266188 n) (A004001 (A087686 n)))

Formula

a(n) = A004001(A087686(n)).