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 A106253 First difference of A106252. 1

%I

%S 2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,

%T 3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,

%U 2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2

%N First difference of A106252.

%C It appears that this sequence is periodic with period 6.

%C Terms of the simple continued fraction of 21/[2*sqrt(78)-9]. Decimal expansion of 2441/10989. [From _Paolo P. Lava_, Aug 05 2009]

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 0, 1, 1).

%F a(n)=1/90*{-4*(n mod 6)+41*[(n+1) mod 6]-19*[(n+2) mod 6]+26*[(n+3) mod 6]+11*[(n+4) mod 6]+11*[(n+5) mod 6]} - _Paolo P. Lava_, Nov 21 2006

%F a(n)=1/90*{-4*(n mod 6)+41*[(n+1) mod 6]-19*[(n+2) mod 6]+26*[(n+3) mod 6]+11*[(n+4) mod 6]+11*[(n+5) mod 6]} with n>=0 - _Paolo P. Lava_, Nov 27 2006

%t LinearRecurrence[{-1, 0, 1, 1},{2, 2, 2, 1},105] (* _Ray Chandler_, Aug 26 2015 *)

%Y Cf. A106252.

%Y Cf. A083039. [From _R. J. Mathar_, Aug 24 2008]

%K nonn

%O 1,1

%A _John W. Layman_, Apr 27 2005

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Last modified April 20 20:26 EDT 2021. Contains 343137 sequences. (Running on oeis4.)