A191326 Increasing sequence generated by these rules: a(1)=1, and if x is in a then [3x/2] and [7x/2] are in a, where [ ]=floor.

1, 3, 4, 6, 9, 10, 13, 14, 15, 19, 21, 22, 28, 31, 33, 35, 42, 45, 46, 49, 52, 63, 66, 67, 69, 73, 77, 78, 94, 98, 99, 100, 103, 108, 109, 115, 117, 122, 141, 147, 148, 150, 154, 157, 161, 162, 163, 171, 172, 175, 182, 183, 211, 220, 222, 225, 231, 234, 235, 241, 243, 244, 255, 256, 258, 262, 269, 273, 274, 316, 329, 330, 333, 337, 343

Offset

1,2

Comments

See A191323.

Links

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

Example

1 -> 3 -> 4,10 -> 6,14,15,35 ->

Mathematica

h = 3; i = 0; j = 7; k = 0; f = 1; g = 15;
Union[Flatten[NestList[{Floor[h #/2] + i, Floor[j #/2] + k} &, f, g]]]
(* A191326 *)

Crossrefs

Cf. A191323.

Sequence in context: A050131 A332023 A361837 * A191185 A089986 A101448

Adjacent sequences: A191323 A191324 A191325 * A191327 A191328 A191329

Keyword

nonn

Author

Clark Kimberling, May 30 2011

Extensions

Missing terms added by Ivan Neretin, May 17 2018

Status

approved