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!)
A103948 a(n) is the number of distinct n-th powers of functions {1, 2, 3} -> {1, 2, 3}. 3
1, 27, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19, 12, 21, 10, 21, 12, 19 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..69.

Index entries for linear recurrences with constant coefficients, signature (-1, 0, 1, 1).

FORMULA

For n > 1, a(n) = a(n+6).

G.f.: (6*x^5-3*x^4-30*x^3-39*x^2-28*x-1) / ((x-1)*(x+1)*(x^2+x+1)). - Colin Barker, Aug 07 2013

MATHEMATICA

Join[{1, 27}, LinearRecurrence[{-1, 0, 1, 1}, {12, 19, 12, 21}, 68]] (* Ray Chandler, Sep 08 2015 *)

CROSSREFS

Cf. A102687, A102709, A103947, A103949, A103950.

Row n=3 of A247026.

Sequence in context: A040706 A069893 A013681 * A323835 A040705 A317106

Adjacent sequences:  A103945 A103946 A103947 * A103949 A103950 A103951

KEYWORD

easy,nonn

AUTHOR

David Wasserman, Feb 21 2005

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 August 8 06:27 EDT 2020. Contains 336290 sequences. (Running on oeis4.)