Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A095293
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A095293 Number of A095283-primes in range ]2^n,2^(n+1)]. +0
3
0, 2, 1, 4, 4, 9, 14, 29, 52, 90, 167, 312, 577, 1072, 2026, 3776, 7177, 13585, 25726, 49125, 93569, 178735, 342381, 657180, 1262818, 2430501, 4684999, 9040931, 17470670, 33798206, 65455531, 126889351, 246216909 (list; graph; listen)
OFFSET

1,2

COMMENT

As expected, the ratio a(n)/A095292(n) seems to approach 2: 0, 0, 1, 4, 1.33333, 2.25, 1.55556, 2.07143, 2.26087, 1.91489, 1.89773, 2.05263, 1.95593, 1.98519, 2.01793, 1.95344, 2.00924, 1.99633, 1.99287, 2.0083, 2.00075, 1.99746, 1.99841, 1.99971, 2.00034, 2.00001, 2.00018, 1.99977, 1.99971, 1.99997, 2.00004, 1.99995, 2.00003

LINKS

A. Karttunen and J. Moyer: C-program for computing the initial terms of this sequence

Index entries for sequences related to occurrences of various subsets of primes in range ]2^n,2^(n+1)]

CROSSREFS

a(n) = A036378(n)-A095292(n). Cf. A095005.

Sequence in context: A099932 A008346 A119282 this_sequence A034409 A048049 A057772

Adjacent sequences: A095290 A095291 A095292 this_sequence A095294 A095295 A095296

KEYWORD

nonn

AUTHOR

Antti Karttunen (his-firstname.his-surname(AT)iki.fi), Jun 04 2004

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


AT&T Labs Research