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A117439
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Expansion of (1-x^2)/(1-4x-2x^2+x^4).
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1
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1, 4, 17, 76, 337, 1496, 6641, 29480, 130865, 580924, 2578785, 11447508, 50816737, 225581040, 1001378849, 4445229968, 19732860833, 87596322228, 388849631729, 1726145941404, 7662550168241, 34014896233544, 150995835638929
(list; graph; refs; listen; history; internal format)
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