login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A192735 Left edge of the triangle in A033291. 4
1, 2, 6, 16, 30, 54, 91, 136, 198, 280, 374, 492, 637, 798, 990, 1216, 1462, 1746, 2071, 2420, 2814, 3256, 3726, 4248, 4825, 5434, 6102, 6832, 7598, 8430, 9331, 10272, 11286, 12376, 13510, 14724, 16021, 17366, 18798, 20320, 21894, 23562, 25327, 27148, 29070 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A087483(n-2) * n.

LINKS

Table of n, a(n) for n=1..45.

Index entries for linear recurrences with constant coefficients, signature (2,-1,2,-4,2,-1,2,-1).

FORMULA

G.f.: x*(x^2+1)*(2*x^4+4*x^3+2*x^2+1) / ((x-1)^4*(x^2+x+1)^2). - Colin Barker, Mar 31 2013

MAPLE

A192735 := proc(n)

    A087483(n-2)*n ;

end proc:

seq(A192735(n), n=1..10) ; # R. J. Mathar, Aug 10 2017

PROG

(Haskell) See A033291.

CROSSREFS

Cf. A192736.

Sequence in context: A230853 A160620 A005996 * A330503 A171218 A032091

Adjacent sequences:  A192732 A192733 A192734 * A192736 A192737 A192738

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 08 2011

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 June 19 03:38 EDT 2021. Contains 345125 sequences. (Running on oeis4.)