|
| |
|
|
A129125
|
|
Prune the tree structure defined in sequence A129129 yielding a new irregular table with shape sequence A027336.
|
|
0
| |
|
|
1, 2, 3, 5, 6, 7, 10, 9, 11, 14, 15, 18, 13, 22, 21, 25, 30, 27, 17, 26, 33, 35, 42, 50, 45, 54, 19, 34, 39, 55, 66, 49, 70, 63, 75, 90, 81
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| A000041 begins 1 1 2 3 5 7 11 15 22 30 42 ... and when shifted 0 0 1 1 2 3 5 7 11 15 22 ... by subtraction yielding 1 1 1 2 3 4 6 8 11 15 20 ... shape seq A027736.
|
|
|
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
etc.
These are the values to be omitted leaving
1
2
3
5 6
7 10 9
11 14 15 18
etc.
|
|
|
CROSSREFS
| Cf. A000041 A027336 A129129.
Sequence in context: A100693 A030159 A030161 * A071591 A089105 A028769
Adjacent sequences: A129122 A129123 A129124 * A129126 A129127 A129128
|
|
|
KEYWORD
| easy,more,nonn,tabf
|
|
|
AUTHOR
| Alford Arnold (Alford1940(AT)aol.com), Apr 04 2007
|
| |
|
|
