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A162813 a(n) = 3*a(n-2) for n > 2; a(1) = 5, a(2) = 3. 5
5, 3, 15, 9, 45, 27, 135, 81, 405, 243, 1215, 729, 3645, 2187, 10935, 6561, 32805, 19683, 98415, 59049, 295245, 177147, 885735, 531441, 2657205, 1594323, 7971615, 4782969, 23914845, 14348907, 71744535, 43046721, 215233605, 129140163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Binomial transform is A162562.

LINKS

Table of n, a(n) for n=1..34.

FORMULA

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

G.f.: x*(5+3*x)/(1-3*x^2)

PROG

(MAGMA) [ n le 2 select 7-2*n else 3*Self(n-2): n in [1..34] ];

CROSSREFS

Cf. A162562, A162436, A162766.

Sequence in context: A248983 A298975 A070375 * A166465 A146934 A213762

Adjacent sequences:  A162810 A162811 A162812 * A162814 A162815 A162816

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, Jul 20 2009

STATUS

approved

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Last modified October 18 17:13 EDT 2019. Contains 328186 sequences. (Running on oeis4.)