A191325 Increasing sequence generated by these rules: a(1)=1, and if x is in a then [3x/2] and [5x/2] are in a, where [ ]=floor.

1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 15, 17, 18, 19, 22, 25, 27, 28, 30, 32, 33, 37, 40, 42, 45, 47, 48, 49, 55, 60, 62, 63, 67, 70, 72, 73, 75, 80, 82, 90, 92, 93, 94, 100, 105, 108, 109, 112, 117, 120, 122, 123, 135, 137, 138, 139, 141, 150, 155, 157, 162, 163, 167, 168, 175, 180, 182, 183, 184, 187, 200, 202, 205, 207, 208, 211, 225

Offset

1,2

Comments

See A191323.

Links

Ivan Neretin, Table of n, a(n) for n = 1..10000

Example

1 -> 2 -> 3,5 -> 4,7,12 -> 6,10,17,18,30 ->

Mathematica

h = 3; i = 0; j = 5; k = 0; f = 1; g = 15;
Union[Flatten[NestList[{Floor[h #/2] + i, Floor[j #/2] + k} &, f, g]]]
(* A191325 *)

Crossrefs

Cf. A191323.

Sequence in context: A347517 A358992 A033104 * A190209 A048856 A067175

Adjacent sequences: A191322 A191323 A191324 * A191326 A191327 A191328

Keyword

nonn

Author

Clark Kimberling, May 30 2011

Status

approved