This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A131083 Periodic sequence (26, 16, 6, 2, 6, 16, 26, 30). 5
 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30, 26, 16, 6, 2, 6, 16, 26, 30 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Sixth column of triangular array T defined in A131074. LINKS Index entries for linear recurrences with constant coefficients, signature (1,0,0,-1,1). FORMULA a(1) = a(7) = 26, a(2) = a(6) = 16, a(3) = a(5) = 6, a(4) = 2, a(8) = 30; for n > 8, a(n) = a(n-8). G.f.: (26-10*x-10*x^2-4*x^3+30*x^4)/((1-x)*(1+x^4)) a(n)=(1/28)*{30*(n mod 8)+2*[(n+1) mod 8]-19*[(n+2) mod 8]-19*[(n+3) mod 8]+2*[(n+4) mod 8]+30*[(n+5) mod 8]+51*[(n+6) mod 8]+51*[(n+7) mod 8]}, with n>=0. - Paolo P. Lava and Giorgio Balzarotti, Jun 19 2007 MATHEMATICA PadRight[{}, 90, {26, 16, 6, 2, 6, 16, 26, 30}] (* Harvey P. Dale, Nov 02 2017 *) PROG (PARI) {m=80; for(n=1, m, r=(n-1)%8; print1(if(r==0||r==6, 26, if(r==1||r==5, 16, if(r==2||r==4, 6, if(r==3, 2, 30)))), ", "))} (MAGMA) m:=80; [ [26, 16, 6, 2, 6, 16, 26, 30][(n-1) mod 8 + 1]: n in [1..m] ]; CROSSREFS Cf. A131074, A131030. Sequence in context: A304138 A305044 A064267 * A203597 A040652 A154295 Adjacent sequences:  A131080 A131081 A131082 * A131084 A131085 A131086 KEYWORD nonn,easy,less AUTHOR Klaus Brockhaus, following a suggestion of Paul Curtz, Jun 14 2007 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.

Last modified October 15 05:43 EDT 2019. Contains 328026 sequences. (Running on oeis4.)