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A094359 Pair reversal of a Jacobsthal sequence. 4
0, 1, 2, 2, 10, 6, 42, 22, 170, 86, 682, 342, 2730, 1366, 10922, 5462, 43690, 21846, 174762, 87382, 699050, 349526, 2796202, 1398102, 11184810, 5592406, 44739242, 22369622, 178956970, 89478486, 715827882, 357913942, 2863311530, 1431655766 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Pair reversal of A078008.

a(n+1)-2*a(n) = A000918(n) signed. - Paul Curtz, Jun 29 2008

Pisano period lengths: 1, 1, 6, 1, 4, 6, 6, 2, 18, 4, 10, 6, 12, 6, 12, 2, 8, 18, 18, 4,... - R. J. Mathar, Aug 10 2012

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

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

FORMULA

a(n) = 5*2^n/12-2(-1)^n/3+(-2)^n/4.

G.f.: x*(1+3*x)/((1+x)*(1-4*x^2)).

PROG

(MAGMA) [5*2^n/12-2*(-1)^n/3+(-2)^n/4: n in [0..35]]; // Vincenzo Librandi, Aug 12 2011

CROSSREFS

Cf. A084183, A094360.

Sequence in context: A223126 A127058 A242002 * A129898 A135996 A141610

Adjacent sequences:  A094356 A094357 A094358 * A094360 A094361 A094362

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 26 2004

STATUS

approved

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Last modified June 25 22:15 EDT 2017. Contains 288730 sequences.