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!)
A083200 Polynexus numbers of order 7. 9
0, 1, 17, 118, 514, 1681, 4529, 10612, 22380, 43473, 79057, 136202, 224302, 355537, 545377, 813128, 1182520, 1682337, 2347089, 3217726, 4342394, 5777233, 7587217, 9847036, 12642020, 16069105, 20237841, 25271442, 31307878, 38501009, 47021761 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Bruno Berselli, Table of n, a(n) for n = 1..1000

Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).

FORMULA

a(n) = ((n^7-(n-1)^7)-(n^3-(n-1)^3))/120.

G.f.: x^2*(1+10*x+20*x^2+10*x^3+x^4)/(1-x)^7. - Bruno Berselli, Feb 13 2012

MATHEMATICA

Table[((n^7 - (n - 1)^7) - (n^3 - (n - 1)^3))/120, {n, 31}] (* Bruno Berselli, Feb 13 2012 *)

CROSSREFS

Cf. A079547, A088889-A088894 (similar sequences).

Sequence in context: A196575 A003109 A066607 * A102353 A289663 A048714

Adjacent sequences:  A083197 A083198 A083199 * A083201 A083202 A083203

KEYWORD

nonn,easy

AUTHOR

Xavier Acloque, Jun 01 2003

EXTENSIONS

More terms from David Wasserman, Oct 26 2004

Offset changed (according to the formula) from Bruno Berselli, Feb 13 2012

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 21 00:46 EST 2022. Contains 350473 sequences. (Running on oeis4.)