A167430 Fractal sequence of the interspersion A163255.

1, 2, 1, 3, 2, 4, 1, 3, 5, 2, 4, 6, 1, 3, 5, 7, 2, 4, 6, 8, 1, 3, 5, 7, 9, 2, 4, 6, 8, 10, 1, 3, 5, 7, 9, 11, 2, 4, 6, 8, 10, 12, 1, 3, 5, 7, 9, 11, 13, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15, 2, 4, 6, 8, 10, 12, 14, 16, 1, 3, 5, 7, 9, 11, 13, 15, 17, 2, 4, 6, 8, 10, 12, 14, 16, 18, 1, 3, 5, 7

Offset

1,2

Comments

Both the upper trim and the lower trim of A167430 are identical to A167430.

(The upper trim of a fractal sequence s is what remains after the first

occurrence of each term is deleted; the lower trim of s is what remains

after all 0's are deleted from the sequence s-1.)

Links

Table of n, a(n) for n=1..94.

Formula

The sequence is formed by concatenating rows:

Row 1: ... 1 2

Row 2: ... 1 3 2 4

Row 3: ... 1 3 5 2 4 6

Row n comes from row n-1 by putting 2n-1 just before 2 and 2*n

just after 2n-2.

Crossrefs

Cf. A002260, A163255.

Sequence in context: A084531 A023129 A007337 * A056892 A136523 A319855

Adjacent sequences: A167427 A167428 A167429 * A167431 A167432 A167433

Keyword

nonn

Author

Clark Kimberling, Nov 03 2009

Status

approved