A094360 Pair reversal of Jacobsthal-Lucas numbers.

1, 2, 7, 5, 31, 17, 127, 65, 511, 257, 2047, 1025, 8191, 4097, 32767, 16385, 131071, 65537, 524287, 262145, 2097151, 1048577, 8388607, 4194305, 33554431, 16777217, 134217727, 67108865, 536870911, 268435457, 2147483647, 1073741825

Offset: 0

Author

Paul Barry, Apr 26 2004

Keywords

• easy
• nonn

Comments

Pair reversal of A014551

Links

• Index entries for linear recurrences with constant coefficients, signature (-1,4,4).

Crossrefs

Cf. A084183, A094359.

Programs

Mathematica

LinearRecurrence[{-1,4,4},{1,2,7},40] (* Harvey P. Dale, May 22 2020 *)

Formula

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