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 A062504 Triangle in which k-th row lists natural number values for the collection of riffs with k nodes. 35
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS J. Awbrey, Riffs and Rotes 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

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Last modified February 16 05:10 EST 2019. Contains 320140 sequences. (Running on oeis4.)