|
Search: id:A155671
|
|
| |
|
| 1, 2, 20, 272, 3440, 40952, 468560, 5217032, 56953280, 612579512, 6513215600, 68618940392, 717570463520, 7458134171672, 77123207545040, 794108867905352, 8146979811148160, 83322818300333432, 849905364703000880
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
a(n) is the number of numbers from 1 to 10^n containing a 1 in their decimal expansion. - Charles Greathouse, Mar 25 2009
|
|
FORMULA
|
G.f.: 1/(1-10*x)-1/(1-9*x)+1/(1-x). E.g.f.: e^(10*x)-e^(9*x)+e^x.
|
|
CROSSREFS
|
Equals A016189 + 1. See that entry for more information.
Cf. A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662, A155663, A155664, A155665, A155666, A155667, A155668, A155669, A155670
Sequence in context: A127110 A109106 A099976 this_sequence A124211 A128481 A104462
Adjacent sequences: A155668 A155669 A155670 this_sequence A155672 A155673 A155674
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Mohammad K. Azarian (azarian(AT)evansville.edu), Feb 01 2009
|
|
|
Search completed in 0.002 seconds
|
