A062504 Triangle in which k-th row lists natural number values for the collection of riffs with k nodes.

1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 10, 11, 12, 13, 14, 17, 18, 19, 23, 25, 27, 32, 49, 53, 64, 81, 128, 256, 512, 65536, 15, 20, 21, 22, 24, 26, 28, 29, 31, 34, 36, 37, 38, 41, 43, 46, 48, 50, 54, 59, 61, 67, 83, 97, 98, 103, 106, 121, 125, 131, 162, 169, 227, 241, 243, 289

Offset

0,2

Links

Table of n, a(n) for n=0..65.

Jon Awbrey, Riffs and Rotes

Index entries for sequences that are permutations of the natural numbers

Example

k | natural numbers n such that |riff(n)| = k
0 | 1;
1 | 2;
2 | 3, 4;
3 | 5, 6, 7, 8, 9, 16;
4 | 10, 11, 12, 13, 14, 17, 18, 19, 23, 25, 27, 32, 49, 53, 64, 81, 128, 256, 512, 65536;
The natural number values for the riffs with at most 3 pts are as follows (x = root):
.................o.......o..o.......o
.................|.......^..|.......^
.................v.......|..v.......|
...........o..o..o....o..o..o..o.o..o
...........|..^..|....|..|..^..|.^..^
...........v..|..v....v..v..|..v/...|
Riff:...x;.x,.x;.x,.x.x,.x,.x,.x,...x;
Value:..2;.3,.4;.5,..6.,.7,.8,.9,..16;

Crossrefs

Cf. A061396, A062860.

Sequence in context: A048406 A081433 A032581 * A305458 A102489 A004838

Adjacent sequences: A062501 A062502 A062503 * A062505 A062506 A062507

Keyword

nonn,tabf

Author

Jon Awbrey, Jun 23 2001

Status

approved