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A152224
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a(n)=4*a(n-1)+6*a(n-2), n>1 ; a(0)=1, a(1)=6 .
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1
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1, 6, 30, 156, 804, 4152, 21432, 110640, 571152, 2948448, 15220704, 78573504, 405618240, 2093913984, 10809365376, 55800945408, 234013147008, 1270858260480, 6487511923968, 37575197258752, 173225860578816
(list; graph; refs; listen; history; internal format)
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