A137344 a(n)=4a(n-2). Also 3*A084221.

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

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (0, 4).

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: A244018 A261950 A366065 * A029524 A357726 A045769

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