A087470 a(n) = number of the row (counting from initial row 1) of the array R in A087468 that contains n.

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

Offset

1,2

Comments

A fractal sequence.

Links

Table of n, a(n) for n=1..95.

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)=4 because 11 is in row 4.

Crossrefs

Cf. A087468, A087469.

Sequence in context: A336394 A336472 A058933 * A373215 A191475 A158456

Adjacent sequences: A087467 A087468 A087469 * A087471 A087472 A087473

Keyword

nonn

Author

Clark Kimberling, Sep 09 2003

Status

approved