The OEIS mourns the passing of
Jim Simons
and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A220343
The number of decades below 10^n whose semiprime pattern is the same as semiprime pattern in the previous decade.
0
0, 0, 7, 114, 1794, 24605
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,3
LINKS
Table of n, a(n) for n=1..6.
EXAMPLE
a(3) = 7 because the 7 values less than 10^3 are 104, 389, 435, 438, 529, 658, 884.
CROSSREFS
Cf.
A220063
.
Sequence in context:
A086788
A199672
A240288
*
A183403
A127877
A082487
Adjacent sequences:
A220340
A220341
A220342
*
A220344
A220345
A220346
KEYWORD
nonn
,
base
AUTHOR
Robert G. Wilson v
,
Jonathan Vos Post
, Dec 11 2012
STATUS
approved
Lookup
|
Welcome
|
Wiki
|
Register
|
Music
|
Plot 2
|
Demos
|
Index
|
Browse
|
More
|
WebCam
Contribute new seq. or comment
|
Format
|
Style Sheet
|
Transforms
|
Superseeker
|
Recents
The OEIS Community
| Maintained by
The OEIS Foundation Inc.
License Agreements, Terms of Use, Privacy Policy.
.
Last modified June 6 19:21 EDT 2024. Contains 373134 sequences. (Running on oeis4.)
