OFFSET
0,2
COMMENTS
EXAMPLE
The original tree begins
1;
2;
3, 4;
5, 6, 8;
7, 10, 9, 12, 16;
11, 14, 15, 20, 18, 24, 32;
...
Multiplying by four yields
4;
8;
12, 16;
20, 24, 32;
...
These are the values to be omitted, leaving
1;
2;
3;
5, 6;
7, 10, 9;
11, 14, 15, 18;
...
CROSSREFS
KEYWORD
more,nonn,tabf
AUTHOR
Alford Arnold, Apr 04 2007
STATUS
approved