|
| |
|
|
A062271
|
|
Denominators in partial products of the twin prime constant.
|
|
6
| |
|
|
4, 64, 256, 1024, 16384, 4194304, 452984832, 603979776, 1073741824, 64424509440, 16698832846848, 8906044184985600, 2244323134616371200, 4588393964104581120, 24471434475224432640, 32628579300299243520
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 2,1
|
|
|
REFERENCES
| S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 84-94.
G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, 5th ed., Oxford Univ. Press, 1979, ch. 22.20
|
|
|
LINKS
| S. R. Finch, Hardy-Littlewood constants
|
|
|
FORMULA
| a(n)= a(n-1)*(p(n)-1)^2 / gcd( A062270(n), a(n-1)*(p(n)-1)^2 ) for n > 2.
|
|
|
EXAMPLE
| a(4)= 256= 2*2*4*4*6*6 / gcd( 3*1*5*3*7*5, 2*2*4*4*6*6 ).
|
|
|
CROSSREFS
| A062270 (numerators), A005597 (decimal expansion).
Sequence in context: A090561 A016934 A056229 * A056982 A110258 A030994
Adjacent sequences: A062268 A062269 A062270 * A062272 A062273 A062274
|
|
|
KEYWORD
| easy,nonn,frac
|
|
|
AUTHOR
| Frank.Ellermann(AT)t-online.de, Jun 16 2001
|
| |
|
|
