|
|
A139760
|
|
First quadrisection of A115451.
|
|
1
|
|
|
1, 9, 137, 2185, 34953, 559241, 8947849, 143165577, 2290649225, 36650387593, 586406201481, 9382499223689, 150119987579017, 2401919801264265, 38430716820228233, 614891469123651721, 9838263505978427529, 157412216095654840457, 2518595457530477447305
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 16*a(n-1) - 7.
G.f.: ( 1-8*x ) / ( (16*x-1)*(x-1) ). - R. J. Mathar, Feb 06 2011
|
|
MATHEMATICA
|
LinearRecurrence[{17, -16}, {1, 9}, 20] (* Harvey P. Dale, Apr 02 2018 *)
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|