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A133331 a(2n+1) = 3a(2n)-3a(2n-1)+2a(2n-2), a(2n+2) = 3a(2n+1)-3a(2n), a(0) = 0, a(1) = 1, a(2) = 3. 0
0, 1, 3, 6, 9, 15, 18, 27, 27, 36, 27, 27, 0, -27, -81, -162, -243, -405, -486, -729, -729, -972, -729, -729, 0, 729, 2187, 4374 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..27.

CROSSREFS

Sequence in context: A146562 A179893 A274191 * A276381 A259728 A000741

Adjacent sequences:  A133328 A133329 A133330 * A133332 A133333 A133334

KEYWORD

sign

AUTHOR

Paul Curtz, Oct 19 2007

STATUS

approved

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Last modified August 6 19:52 EDT 2020. Contains 336256 sequences. (Running on oeis4.)