A120634 Decimal equivalent of A066335.

0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12, 19, 18, 17, 16, 23, 22, 21, 20, 27, 26, 25, 24, 31, 30, 29, 28, 35, 34, 33, 32, 39, 38, 37, 36, 43, 42, 41, 40, 47, 46, 45, 44, 51, 50, 49, 48, 55, 54, 53, 52, 59, 58, 57, 56, 63, 62, 61, 60, 67, 66, 65, 64, 71, 70, 69, 68, 75, 74, 73

Offset

0,2

Comments

The same as A004444 except for first 3 terms. - Pietro Battiston, Jan 19 2008

Links

Table of n, a(n) for n=0..71.

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

Formula

From Colin Barker, Oct 06 2014: (Start)

a(n) = (3-(-1)^n-(1-i)*((-i)^n+i*i^n)+n) where i=sqrt(-1).

a(n) = a(n-1)+a(n-4)-a(n-5).

G.f.: -x*(x^3+x^2+x-7) / ((x-1)^2*(x+1)*(x^2+1)).

(End)

Mathematica

LinearRecurrence[{1, 0, 0, 1, -1}, {0, 7, 6, 5, 4}, 80] (* Harvey P. Dale, May 10 2015 *)

Prog

(PARI) concat(0, Vec(-x*(x^3+x^2+x-7)/((x-1)^2*(x+1)*(x^2+1)) + O(x^100))) \\ Colin Barker, Oct 06 2014

Crossrefs

Cf. A004444, A066335.

Sequence in context: A340258 A074921 A182209 * A178753 A104178 A092874

Adjacent sequences: A120631 A120632 A120633 * A120635 A120636 A120637

Keyword

base,easy,nonn

Author

Joshua Zucker, Jun 21 2006

Status

approved