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!)
A011939 [ n(n-1)(n-2)(n-3)/29 ]. 0
0, 0, 0, 0, 0, 4, 12, 28, 57, 104, 173, 273, 409, 591, 828, 1129, 1506, 1969, 2532, 3207, 4009, 4953, 6053, 7328, 8793, 10468, 12372, 14524, 16944, 19656, 22680, 26040, 29760, 33864, 38380, 43332, 48748 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
LINKS
Index entries for linear recurrences with constant coefficients, signature (4, -6, 4, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -4, 6, -4, 1).
FORMULA
From Chai Wah Wu, Aug 02 2020: (Start)
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) + a(n-29) - 4*a(n-30) + 6*a(n-31) - 4*a(n-32) + a(n-33) for n > 32.
G.f.: x^5*(-4*x^26 + 4*x^25 - 4*x^24 - x^23 + x^21 - 5*x^20 + 4*x^19 - 5*x^18 + x^17 - 3*x^15 + 2*x^14 - 4*x^13 + 2*x^12 - 3*x^11 + x^9 - 5*x^8 + 4*x^7 - 5*x^6 + x^5 - x^3 - 4*x^2 + 4*x - 4)/(x^33 - 4*x^32 + 6*x^31 - 4*x^30 + x^29 - x^4 + 4*x^3 - 6*x^2 + 4*x - 1). (End)
PROG
(PARI) a(n)=n*(n-1)*(n-2)*(n-3)\29 \\ Charles R Greathouse IV, Oct 18 2022
CROSSREFS
Sequence in context: A223764 A102653 A102650 * A203286 A028346 A356728
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)