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

Author

Clark Kimberling, Nov 03 2009

Keywords

• nonn

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.)

Crossrefs

Cf. A002260, A163255.

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.