A134562 Array T by antidiagonals: T(n,k) = k-th number whose formal base-3 representation has exactly n terms. ("Formal" means that all the nonzero coefficients are 1's.).

1, 3, 2, 9, 4, 5, 27, 6, 7, 8, 81, 10, 11, 14, 17, 243, 12, 13, 16, 23, 26, 729, 18, 15, 20, 25, 44, 53, 2187, 28, 19, 22, 35, 50, 71

Offset

1,2

Comments

A permutation of the natural numbers. Except for initial terms in some cases, (Row 1) = A000244, (Row 2) = A055235, (Col 1) = A062318. For the analogous base-2 array, see A067576.

Links

Table of n, a(n) for n=1..35.

Example

11 = 9 + 1 + 1 is the 3rd largest number (after 5 and 7) that has
a 3-term formal base-3 representation.
Northwest corner:
1 3 9 27 81
2 4 6 10 12
5 7 11 13 15
8 14 16 20 22

Crossrefs

Cf. A067576, A000244, A055235, A062318.

Sequence in context: A351444 A104005 A224578 * A090639 A294370 A325984

Adjacent sequences: A134559 A134560 A134561 * A134563 A134564 A134565

Keyword

nonn,tabl

Author

Clark Kimberling, Nov 01 2007

Status

approved