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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027965 T(n,2n-3), T given by A027960. 2
3, 7, 15, 28, 47, 73, 107, 150, 203, 267, 343, 432, 535, 653, 787, 938, 1107, 1295, 1503, 1732, 1983, 2257, 2555, 2878, 3227, 3603, 4007, 4440, 4903, 5397 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..31.

FORMULA

G.f.: [x^2*(3-2x)*(1-x+x^2)]/(1-x)^4. Differences of A027966. - Ralf Stephan, Feb 07 2004

CROSSREFS

a(n+2) = A074742(n-1) = A008778(n)+2 = A000297(n-1)+3.

A column of triangle A027011.

Sequence in context: A103021 A025587 A101498 * A130145 A023552 A293316

Adjacent sequences:  A027962 A027963 A027964 * A027966 A027967 A027968

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 15 16:53 EST 2019. Contains 320136 sequences. (Running on oeis4.)