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A098183
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a(n)=3a(n-1)+a(n-3), a(0)=1,a(1)=1,a(2)=4.
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2
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1, 1, 4, 13, 40, 124, 385, 1195, 3709, 11512, 35731, 110902, 344218, 1068385, 3316057, 10292389, 31945552, 99152713, 307750528, 955197136, 2964744121, 9201982891, 28561145809, 88648181548, 275146527535, 854000728414
(list; graph; refs; listen; history; internal format)
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