|
| |
|
|
A059723
|
|
Mean of first 2^n nonnegative powers of 3, i.e. (1+3+3^2+...+3^(2^n-1))/2^n.
|
|
6
| | |
|
|
|
OFFSET
| 0,2
|
|
|
LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,11
|
|
|
FORMULA
| a(n) =(3^(2^n)-1)/2^(n+1)
|
|
|
EXAMPLE
| a(3)=(1+3+9+27+81+243+729+2187)/8=3280/8=410
|
|
|
PROG
| (PARI) { for (n=0, 11, write("b059723.txt", n, " ", (3^(2^n) - 1)/2^(n + 1)); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 28 2009]
|
|
|
CROSSREFS
| Cf. A059721, A059722.
Sequence in context: A015178 A206152 A013034 * A112449 A011824 A064300
Adjacent sequences: A059720 A059721 A059722 * A059724 A059725 A059726
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Feb 07 2001
|
| |
|
|
