|
| |
|
|
A027942
|
|
T(2n+1,n+2), T given by A027935.
|
|
0
|
|
|
|
1, 11, 51, 176, 530, 1490, 4043, 10773, 28445, 74770, 196116, 513876, 1345861, 3524111, 9226935, 24157220, 63245318, 165579398, 433493615, 1134902265, 2971214081, 7778740966, 20365009896, 53316289896
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Table of n, a(n) for n=1..24.
Index to sequences with linear recurrences with constant coefficients, signature (6,-13,13,-6,1).
|
|
|
FORMULA
|
a(n) = Fibonacci(2*n+5) - 2*n^2 - 5*n - 5.
G.f.: x*(1+5*x-2*x^2)/((1-x)^3*(1-3*x+x^2)). [Colin Barker, Sep 20 2012]
|
|
|
PROG
|
(MAGMA) [Fibonacci(2*n+5)-2*n^2-5*n-5: n in [1..30]]; // Vincenzo Librandi, Apr 18 2011
|
|
|
CROSSREFS
|
Sequence in context: A185505 A051843 A107464 * A168214 A191341 A199895
Adjacent sequences: A027939 A027940 A027941 * A027943 A027944 A027945
|
|
|
KEYWORD
|
nonn,easy
|
|
|
AUTHOR
|
Clark Kimberling
|
|
|
STATUS
|
approved
|
| |
|
|
