|
Search: id:A032125
|
|
|
| A032125 |
|
"BIK" (reversible, indistinct, unlabeled) transform of 3,3,3,3... |
|
+0
3
|
|
| 3, 9, 30, 108, 408, 1584, 6240, 24768, 98688, 393984, 1574400, 6294528, 25171968, 100675584, 402677760, 1610661888, 6442549248, 25770000384, 103079608320, 412317646848, 1649269014528, 6597072912384
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Number of solutions (x,y,z) to x+y+z = 2^n, x>=0, y>=0, z>=0, gcd(x,y,z)=1. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Dec 22 2002
|
|
LINKS
|
C. G. Bower, Transforms (2)
|
|
FORMULA
|
a(n) = 3*2^(n-2)*(2^(n-1)+1). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Dec 22 2002
|
|
CROSSREFS
|
a(n) = A048240(2^n).
Sequence in context: A053022 A128725 A099783 this_sequence A091699 A129167 A117428
Adjacent sequences: A032122 A032123 A032124 this_sequence A032126 A032127 A032128
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Christian G. Bower (bowerc(AT)usa.net)
|
|
|
Search completed in 0.002 seconds
|
