A243493 Value of Matula-Goebel signature at the fixed points of A069787: a(n) = A127301(A243490(n)).

1, 2, 4, 3, 8, 6, 5, 16, 12, 10, 14, 13, 11, 32, 24, 20, 28, 26, 22, 37, 23, 34, 31, 64, 48, 40, 56, 52, 44, 74, 46, 68, 62, 76, 39, 89, 61, 47, 86, 101, 118, 109, 127, 128, 96, 80, 112, 104, 88, 148, 92, 136, 124, 152, 78, 178, 122, 94, 172, 202, 236, 218, 254

Offset

0,2

Comments

The first duplicate value occurs at n=101, as a(101) = a(129) = 362. The corresponding A014486-indices are A243490(101) = 924 and A243490(129) = 1640, respectively.

Links

Antti Karttunen, Table of n, a(n) for n = 0..525

Formula

a(n) = A127301(A243490(n)).

a(n) = A243491(A243490(n)).

For all n >= 0, a(A036256(n)-1) = A007097(n) and a(A036256(n)) = A000079(n+1).

Prog

(Scheme, two variants)
(define (A243493 n) (A127301 (A243490 n)))
(define (A243493 n) (A243491 (A243490 n)))

Crossrefs

A243494 gives the same terms sorted into ascending order with duplicates removed.

Cf. A243496, A209636, A209637, A069787, A127301, A243490, A243491, A000079, A007097, A036256.

Sequence in context: A246166 A334437 A264802 * A127301 A209636 A243491

Adjacent sequences: A243490 A243491 A243492 * A243494 A243495 A243496

Keyword

nonn,look,hear

Author

Antti Karttunen, Jun 07 2014

Status

approved