|
|
A371571
|
|
Irregular triangle read by rows: row n lists the 1-based positions (starting from the left) of zeros in the binary expansion of n, or 0 if the binary expansion of n contains only ones.
|
|
18
|
|
|
1, 0, 2, 0, 2, 3, 2, 3, 0, 2, 3, 4, 2, 3, 2, 4, 2, 3, 4, 3, 4, 0, 2, 3, 4, 5, 2, 3, 4, 2, 3, 5, 2, 3, 2, 4, 5, 2, 4, 2, 5, 2, 3, 4, 5, 3, 4, 3, 5, 3, 4, 5, 4, 5, 0, 2, 3, 4, 5, 6, 2, 3, 4, 5, 2, 3, 4, 6, 2, 3, 4, 2, 3, 5, 6, 2, 3, 5, 2, 3, 6, 2, 3, 2, 4, 5, 6
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
EXAMPLE
|
Triangle begins:
[0] 1;
[1] 0;
[2] 2;
[3] 0;
[4] 2, 3;
[5] 2;
[6] 3;
[7] 0;
[8] 2, 3, 4;
...
Row n = 50 is 3, 4, 6:
binary expansion of 50: 1 1 0 0 1 0
positions of zeros: - - 3 4 - 6
|
|
MATHEMATICA
|
Array[Replace[Flatten[Position[IntegerDigits[#, 2], 0]], {} -> {0}] &, 50, 0]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base,tabf,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|