|
Search: id:A123121
|
|
| |
|
| 1, 3, 7, 15, 31, 63, 127, 255, 511, 1024, 2050, 4102, 8206, 16414, 32830, 65662, 131326, 262654, 525310, 1050622, 2101246, 4202494, 8404990, 16809982, 33619966, 67239934, 134479870, 268959742, 537919486, 1075838974, 2151677950
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
REFERENCES
|
L. J. Cummings and M. Mays, A one-sided Zimin construction, Electron. J. Combin. 8 (2001), #R27
A. I. Zimin, Blocking sets of terms, Math. USSR Sbornik, 47 (1984), No. 2, 353-364.
|
|
FORMULA
|
L(n) = 2*L(n-1) + ceil(log_10(n+1))
|
|
EXAMPLE
|
The Zimin words are defined by Z_1 = 1, Z_n = Z_{n-1}nZ_{n-1}.
So the Zimin words are 1, 121, 1213121, 121312141213121 ...
|
|
CROSSREFS
|
Cf. A082215.
Sequence in context: A060152 A126646 A000225 this_sequence A117060 A057613 A146686
Adjacent sequences: A123118 A123119 A123120 this_sequence A123122 A123123 A123124
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Dmitry Kamenetsky (Dmitry.Kamenetsky(AT)rsise.anu.edu.au), Sep 29 2006
|
|
|
Search completed in 0.002 seconds
|
