A131968 Interspersion of the Farey fractal sequence, A131967.

1, 3, 2, 6, 5, 4, 11, 10, 8, 7, 18, 17, 14, 13, 9, 29, 28, 23, 21, 15, 12, 42, 41, 35, 33, 25, 20, 16, 61, 60, 51, 48, 37, 32, 26, 19, 86, 85, 71, 68, 54, 46, 38, 31, 22

Offset: 1

Author

Clark Kimberling, Aug 02 2007

Keywords

• nonn
• tabl

Comments

A permutation of the natural numbers.

Examples

			Northwest corner:
1 3 6 11 18
2 5 10 17 28
4 8 14 23 35
7 13 21 33 48
		

References

• C. Kimberling, "Fractal sequences and interspersions," Ars Combinatoria 45 (1997) 157-168.

Crossrefs

Cf. A131967.

Formula

Rectangular array T given by antidiagonals. T(i,j) = the j-th index n such that A131967(n)=i.