|
| |
|
|
A002276
|
|
2(10^n - 1)/9.
|
|
22
| |
|
|
0, 2, 22, 222, 2222, 22222, 222222, 2222222, 22222222, 222222222, 2222222222, 22222222222, 222222222222, 2222222222222, 22222222222222, 222222222222222, 2222222222222222, 22222222222222222
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| a(n) = A178630(n)/A002283(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 31 2010]
|
|
|
FORMULA
| a(n)=10*a(n-1)+2, with a(0)=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Jan 23 2009]
a(n)=a(n-1)+2*10^(n-1) with a(0)=0; Also: a(n)=11*a(n-1)-10*a(n-2) with a(0)=0, a(1)=2. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 22 2010]
|
|
|
CROSSREFS
| Cf. A002275, A002277, A002278, A002279, A002280, A002281, A002282, A178634. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 31 2010]
Sequence in context: A037567 A174200 A137109 * A112893 A086855 A089182
Adjacent sequences: A002273 A002274 A002275 * A002277 A002278 A002279
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
