A191326 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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]]]