OFFSET
1,5
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..4000
FORMULA
a(n) = floor((n+3)/4)^((-2*(n mod 4)^3+9*(n mod 4)^2 - 11*(n mod 4) + 8)/2). - Luce ETIENNE, Apr 07 2018
From Chai Wah Wu, Jan 11 2020: (Start)
a(n) = 5*a(n-4) - 10*a(n-8) + 10*a(n-12) - 5*a(n-16) + a(n-20) for n > 20.
G.f.: x*(-x^15 + x^14 + x^13 - x^12 - 11*x^11 - 3*x^10 + 3*x^9 + x^8 - 11*x^7 + 3*x^6 - 3*x^5 + x^4 - x^3 - x^2 - x - 1)/((x - 1)^5*(x + 1)^5*(x^2 + 1)^5). (End)
MATHEMATICA
Flatten[Table[{n^2, n^3, n, n^4}, {n, 40}]] (* Vincenzo Librandi, Feb 06 2013 *)
PROG
(Magma) &cat[[n^2, n^3, n, n^4]: n in [1..20]]; // Vincenzo Librandi, Feb 06 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Sep 14 2005
STATUS
approved