|
|
A342217
|
|
The n-th and a(n)-th points of the Hilbert's Hamiltonian walk (A059252, A059253) are symmetrical with respect to the line X=Y.
|
|
3
|
|
|
0, 3, 2, 1, 14, 15, 12, 13, 8, 11, 10, 9, 6, 7, 4, 5, 58, 57, 56, 59, 60, 63, 62, 61, 50, 49, 48, 51, 52, 55, 54, 53, 32, 35, 34, 33, 46, 47, 44, 45, 40, 43, 42, 41, 38, 39, 36, 37, 26, 25, 24, 27, 28, 31, 30, 29, 18, 17, 16, 19, 20, 23, 22, 21, 234, 235, 232
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
This sequence is a self-inverse permutation of the nonnegative integers.
|
|
LINKS
|
|
|
FORMULA
|
a(n) < 16^k for any n < 16^k.
|
|
EXAMPLE
|
+ +-----+-----+
|15 |12 11 |10
| | |
+-----+ +-----+
14 13 |8 9
|
+-----+ +-----+
|1 |2 7 |6
| | |
+ +-----+-----+
0 3 4 5
- so a(0) = 0,
a(1) = 3,
a(2) = 2,
a(4) = 14,
a(5) = 15,
a(7) = 13,
a(8) = 8,
a(9) = 11,
a(10) = 10.
|
|
PROG
|
(PARI) See Links section.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|