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0, 27, 108, 243, 432, 675, 972, 1323, 1728, 2187, 2700, 3267, 3888, 4563, 5292, 6075, 6912, 7803, 8748, 9747, 10800, 11907, 13068, 14283, 15552, 16875, 18252, 19683, 21168, 22707, 24300, 25947, 27648, 29403, 31212, 33075, 34992, 36963, 38988, 41067, 43200
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: 27*x*(1 + x)/(1 - x)^3.
a(n) = 3*a(n-1) -3*a(n-2) +a(n-3) for n>2.
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MATHEMATICA
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Table[27 n^2, {n, 0, 40}]
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PROG
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(Magma) [27*n^2: n in [0..40]];
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CROSSREFS
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Cf. similar sequences listed in A244630.
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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