|
|
A221950
|
|
G.f.: 1/(1 - x - x^2 - 2*x^3 - 3*x^4 - 2*x^5 - x^6).
|
|
0
|
|
|
1, 1, 2, 5, 12, 26, 57, 127, 284, 632, 1405, 3126, 6958, 15485, 34458, 76679, 170638, 379730, 845028, 1880472, 4184690, 9312363, 20723179, 46116124, 102624071, 228373494, 508208766, 1130937495, 2516720889, 5600560664, 12463153900, 27734759853, 61719281504, 137346410422, 305642515549, 680158637002, 1513584491513, 3368240713740, 7495482128252
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
MATHEMATICA
|
LinearRecurrence[{1, 1, 2, 3, 2, 1}, {1, 1, 2, 5, 12, 26}, 40] (* Harvey P. Dale, Dec 19 2014 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|