A087469 a(n) = number of the row (counting from initial row 0) of the array R in A087468 that contains n.

0, 1, 0, 2, 1, 3, 0, 2, 4, 1, 3, 0, 5, 2, 4, 1, 6, 3, 0, 5, 2, 7, 4, 1, 6, 3, 0, 8, 5, 2, 7, 4, 1, 9, 6, 3, 0, 8, 5, 2, 10, 7, 4, 1, 9, 6, 3, 0, 11, 8, 5, 2, 10, 7, 4, 1, 12, 9, 6, 3, 0, 11, 8, 5, 2, 13, 10, 7, 4, 1, 12, 9, 6, 3, 0, 14, 11, 8, 5, 2, 13, 10, 7, 4, 1, 15, 12, 9, 6, 3, 0, 14, 11, 8, 5, 2, 16

Offset

1,4

Comments

A fractal sequence.

Links

Table of n, a(n) for n=1..97.

Clark Kimberling and John E. Brown, Partial Complements and Transposable Dispersions, J. Integer Seqs., Vol. 7, 2004.

Example

Northwest corner of R:
.1 3 7 12 19
.2 5 10 16 24
.4 8 14 21 30
.6 11 18 26 36
.9 15 23 32 43
a(11)=3 because 11 is in row 3.

Crossrefs

Cf. A087468, A087470.

Sequence in context: A217176 A335097 A334312 * A022328 A215344 A025641

Adjacent sequences: A087466 A087467 A087468 * A087470 A087471 A087472

Keyword

nonn

Author

Clark Kimberling, Sep 09 2003

Status

approved