|
|
|
|
9, 69, 489, 3429, 24009, 168069, 1176489, 8235429, 57648009, 403536069, 2824752489, 19773267429, 138412872009, 968890104069, 6782230728489, 47475615099429, 332329305696009, 2326305139872069, 16284135979104489, 113988951853731429
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
LINKS
|
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (8,-7).
|
|
FORMULA
|
a(n) = 7*a(n-1)+6. a(n) = 8*a(n-1)-7*a(n-2), n>1.
G.f. ( 9-3*x ) / ( (7*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011
|
|
MATHEMATICA
|
10*7^Range[0, 20]-1 (* or *) LinearRecurrence[{8, -7}, {9, 69}, 20] (* Harvey P. Dale, Mar 30 2016 *)
|
|
PROG
|
(Magma) [10*7^n-1: n in [0..30]]
|
|
CROSSREFS
|
Cf. A024075, A048473, A081655, A198480, A198647.
Sequence in context: A072258 A196490 A297593 * A125372 A165147 A075045
Adjacent sequences: A198688 A198689 A198690 * A198692 A198693 A198694
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Vincenzo Librandi, Oct 29 2011
|
|
STATUS
|
approved
|
|
|
|