[seqfan] minima of certain sets(recursive)

[Tobias Friedrich]

Hello,

How can you decide if a number occurs in this sequence?

M_0={}
a_n=min(N\( {2x_1+3x_2| x_1,x_2 in M_{n-1}} u M_{n-1} ))
M_n=M_{n-1} u {a_n}


Sorry for my bad formating. 
This file include formulas and some diagrams. You can see that there are some "steps" in the sequnce.
http://tobispace.to.funpic.de/folge.pdf

Sequence:
1, 2, 3, 4, 6, 19, 23, 25, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,...
http://tobispace.to.funpic.de/fach.txt (Sequence to  49999792)  


Moreover you can make generalizations, i.e. you can change the coefficients 2,3 or you can change the number of variables x_1,x_2,x_3,...

But this example is the simplest non trivial example.

Sincerely yours,

Tobias Friedrichy yours,