A094360 - OEIS

%I #7 May 22 2020 17:56:05

%S 1,2,7,5,31,17,127,65,511,257,2047,1025,8191,4097,32767,16385,131071,

%T 65537,524287,262145,2097151,1048577,8388607,4194305,33554431,

%U 16777217,134217727,67108865,536870911,268435457,2147483647,1073741825

%N Pair reversal of Jacobsthal-Lucas numbers.

%C Pair reversal of A014551

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (-1,4,4).

%F G.f. : (1+3x+5x^2)/((1+x)(1-4x^2)); a(n)=2^n(5+3(-1)^n)/4-(-1)^n.

%t LinearRecurrence[{-1,4,4},{1,2,7},40] (* _Harvey P. Dale_, May 22 2020 *)

%Y Cf. A084183, A094359.

%K easy,nonn

%O 0,2

%A _Paul Barry_, Apr 26 2004