login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027055 a(n) = T(n, n+4), T given by A027052. 0
1, 18, 59, 146, 319, 652, 1281, 2456, 4637, 8670, 16111, 29822, 55067, 101528, 187013, 344276, 633561, 1165674, 2144419, 3944650, 7255831, 13346084, 24547849, 45151152, 83046581, 152747190, 280946647, 516742262, 950438067 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..32.

FORMULA

Conjectures from Colin Barker, Feb 19 2016: (Start)

a(n) = 4*a(n-1)-5*a(n-2)+2*a(n-3)-a(n-4)+2*a(n-5)-a(n-6) for n>9.

G.f.: x^4*(1+14*x-8*x^2-2*x^3-5*x^4+4*x^5) / ((1-x)^3*(1-x-x^2-x^3)).

(End)

CROSSREFS

Sequence in context: A155155 A048356 A244806 * A056448 A056438 A218617

Adjacent sequences:  A027052 A027053 A027054 * A027056 A027057 A027058

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 17 00:14 EST 2018. Contains 317275 sequences. (Running on oeis4.)