|
| |
|
|
A164439
|
|
Number of binary strings of length n with no substrings equal to 0000 0110 or 1001
|
|
1
|
|
|
|
13, 21, 34, 56, 92, 151, 247, 405, 663, 1087, 1780, 2918, 4779, 7833, 12830, 21027, 34444, 56446, 92469, 151528, 248242, 406776, 666426, 1091993, 1789068, 2931473, 4802866, 7869607, 12893569, 21126181, 34613470, 56713903, 92921589, 152250422
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
4,1
|
|
|
LINKS
|
R. H. Hardin, Table of n, a(n) for n=4..500
Index entries for linear recurrences with constant coefficients, signature (1,1,-1,2,-1,1).
|
|
|
FORMULA
|
G.f. -x^4*(13+8*x+14*x^3-3*x^4+8*x^5) / ( -1+x+x^2-x^3+2*x^4-x^5+x^6 ). - R. J. Mathar, Jan 19 2011
|
|
|
MATHEMATICA
|
LinearRecurrence[{1, 1, -1, 2, -1, 1}, {13, 21, 34, 56, 92, 151}, 40] (* Harvey P. Dale, Dec 13 2014 *)
|
|
|
CROSSREFS
|
Sequence in context: A164503 A067516 A164449 * A164492 A164451 A164432
Adjacent sequences: A164436 A164437 A164438 * A164440 A164441 A164442
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
R. H. Hardin Aug 14 2009
|
|
|
STATUS
|
approved
|
| |
|
|
