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A097081
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Sum C(n,4k)2^k, k = 0 . . n.
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0
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1, 1, 1, 1, 3, 11, 31, 71, 145, 289, 601, 1321, 2979, 6683, 14743, 32111, 69697, 151777, 332113, 728689, 1598883, 3503627, 7668079, 16774775, 36704017, 80343361, 175916521, 385196761, 843365379, 1846290395, 4041672871, 8847607391
(list; graph; refs; listen; history; internal format)
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