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A173564
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a(n) = a(n-1) + a(n-2) - [a(n-3)/4] - [a(n-4)/2] - [a(n-5)/4].
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2
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1, 1, 2, 3, 5, 8, 12, 18, 26, 36, 50, 68, 92, 124, 165, 220, 291, 385, 508, 670, 882, 1161, 1526, 2005, 2633, 3457, 4536, 5952, 7807, 10239, 13426, 17604, 23080, 30258, 39665, 51995, 68155, 89335, 117096, 153480, 201168, 263669, 345586, 452949, 593664, 778091, 1019808, 1336613, 1751830, 2296030, 3009281
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