|
| |
|
|
A055143
|
|
The first n digits of the juxtaposition of the base 2 numbers converted to decimal.
|
|
15
| |
|
|
1, 3, 6, 13, 27, 55, 110, 220, 441, 882, 1765, 3531, 7063, 14126, 28253, 56507, 113015, 226031, 452062, 904124, 1808248, 3616497, 7232994, 14465988, 28931977, 57863955, 115727910, 231455821, 462911642, 925823285, 1851646570
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
EXAMPLE
| 1 (1); 11 (3); 110 (6); 1101 (13); 11011 (27); 110111 (55); ...
|
|
|
MAPLE
| P:=proc(i) local a, b, j, len, k, n; j:=0; for n from 1 by 1 to i do a:=convert(n, binary); len:=length(a); while len>0 do len:=len-1; b:=trunc(10*frac(trunc(a/10^len)/10)); j:=j*10; if b=1 then j:=j+1; fi; k:=convert(j, decimal, binary); lprint(n, k); od; od; end: P(50); [From Paolo P. Lava (paoloplava(AT)gmail.com), Mar 16 2010]
|
|
|
CROSSREFS
| Cf. A030190, A054633, A055074, A055144-A055150.
Sequence in context: A033129 A079403 A065830 * A092539 A094386 A099036
Adjacent sequences: A055140 A055141 A055142 * A055144 A055145 A055146
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.
|
| |
|
|
