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A137344 a(n)=4a(n-2). Also 3*A084221. 0
3, 9, 12, 36, 48, 144, 192, 576, 768, 2304, 3072, 9216, 12288, 36864, 49152, 147456, 196608, 589824, 786432, 2359296, 3145728, 9437184, 12582912, 37748736, 50331648, 150994944, 201326592, 603979776, 805306368, 2415919104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..29.

MATHEMATICA

RecurrenceTable[{a[1]==3, a[2]==9, a[n]==4*a[n-2]}, a, {n, 30}] (* or *) LinearRecurrence[ {0, 4}, {3, 9}, 30] (* Harvey P. Dale, Sep 20 2018 *)

CROSSREFS

Sequence in context: A081601 A244018 A261950 * A029524 A262539 A101537

Adjacent sequences:  A137341 A137342 A137343 * A137345 A137346 A137347

KEYWORD

nonn

AUTHOR

Paul Curtz, Apr 21 2008

EXTENSIONS

More terms from Harvey P. Dale, Sep 20 2018

STATUS

approved

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Last modified April 19 19:00 EDT 2019. Contains 322290 sequences. (Running on oeis4.)