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A171451
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a(n) = 2^C(n, 2) * 2^floor(n/3).
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2
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1, 1, 2, 16, 128, 2048, 131072, 8388608, 1073741824, 549755813888, 281474976710656, 288230376151711744, 1180591620717411303424, 4835703278458516698824704, 39614081257132168796771975168, 1298074214633706907132624082305024, 42535295865117307932921825928971026432
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OFFSET
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0,3
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COMMENTS
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LINKS
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FORMULA
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MATHEMATICA
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Table[2^Binomial[n, 2] 2^Floor[n/3], {n, 0, 20}] (* Harvey P. Dale, Nov 20 2021 *)
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PROG
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CROSSREFS
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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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