login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A299017 Intersection of A264041 and A000217. 1
1, 3, 6, 10, 21, 36, 55, 78, 105, 136, 171, 210, 253, 300, 351 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

FORMULA

Conjectures (Start)

G.f.: x*(1 + 6*x^4 - 3*x^5) / (1 - x)^3.

a(n) = 6 - 7*n + 2*n^2 for n>3.

a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n>3.

(End)

CROSSREFS

Cf. A000217, A264041.

Sequence in context: A068855 A068882 A076713 * A136569 A061883 A027671

Adjacent sequences:  A299014 A299015 A299016 * A299018 A299019 A299020

KEYWORD

nonn,more

AUTHOR

Colin Barker, Jan 31 2018

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 January 25 06:44 EST 2022. Contains 350565 sequences. (Running on oeis4.)