|
| |
|
|
A045507
|
|
Concatenate powers of 2.
|
|
1
| |
|
|
1, 12, 124, 1248, 124816, 12481632, 1248163264, 1248163264128, 1248163264128256, 1248163264128256512, 12481632641282565121024, 124816326412825651210242048, 1248163264128256512102420484096
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
REFERENCES
| A. Murthy, Smarandache Notions Journal, Vol. 11 N. 1-2-3 Spring 2000
|
|
|
LINKS
| M. L. Perez et al., eds., Smarandache Notions Journal
|
|
|
FORMULA
| a(n)=a(n-1)*10^(floor(1+log10(2^n)))+2^n, with a(0)=1 [From Paolo P. Lava (paoloplava(AT)gmail.com), Oct 29 2008]
|
|
|
EXAMPLE
| 124 belongs to the sequence because it is the concatenation of 2^0, 2^1 and 2^2.
|
|
|
MAPLE
| P:=proc(i) local a, n; a:=1; print(a); for n from 2 by 1 to i do a:=(a*10^trunc(evalf(floor(1+log10(2^n)), 100))+2^n); print(a); od; end: P(100); [From Paolo P. Lava (paoloplava(AT)gmail.com), Oct 29 2008]
|
|
|
CROSSREFS
| Sequence in context: A120918 A039680 A016134 * A155595 A070312 A153427
Adjacent sequences: A045504 A045505 A045506 * A045508 A045509 A045510
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Jeff Burch (gburch(AT)erols.com)
|
|
|
EXTENSIONS
| Murthy reference from Felice Russo (frusso(AT)micron.com or frusso(AT)micron.com - Nov 15 1999)
|
| |
|
|
