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A122038
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a(n) = 1*3^(3*n)+2*3^(2*n)-3*3^(1*n).
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36, 864, 21060, 544320, 14466276, 388481184, 10469912580, 282515610240, 7626372266916, 205898105486304, 5559123328143300, 150095200154477760, 4052560236745849956, 109419034885082920224, 2954313118333054841220
(list; graph; refs; listen; history; internal format)
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