A140899 A140724(n+4). Period 10: repeat 7, 9, 5, 1, 3, 3, 1, 5, 9, 7.

7, 9, 5, 1, 3, 3, 1, 5, 9, 7, 7, 9, 5, 1, 3, 3, 1, 5, 9, 7, 7, 9, 5, 1, 3, 3, 1, 5, 9, 7, 7, 9, 5, 1, 3, 3, 1, 5, 9, 7

Offset

0,1

Comments

A140724= period 10: repeat 1, 5, 9, 7, 7, 9, 5, 1, 3, 3 . a(n) is one of its two palindromic decuplets.

Links

Table of n, a(n) for n=0..39.

Index entries for linear recurrences with constant coefficients, signature (2,-2,2,-2,1).

Formula

Note a(2n)+a(2n+1)= period 5: repeat 16, 6, 6, 6, 16 .

Prog

(PARI) a(n)=[7, 9, 5, 1, 3, 3, 1, 5, 9, 7][n%10+1] \\ Charles R Greathouse IV, Jul 13 2016

Crossrefs

Sequence in context: A179292 A361972 A198756 * A201925 A021561 A216104

Adjacent sequences: A140896 A140897 A140898 * A140900 A140901 A140902

Keyword

nonn,easy

Author

Paul Curtz, Jul 24 2008

Status

approved