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A080497
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a(n) = (n-p_1)(n-p_2)...(n-p_k) where p_k is the k-th prime and is also the largest prime < n.
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3
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1, 1, 1, 2, 6, 12, 40, 90, 336, 840, 1728, 3150, 10560, 24948, 99840, 270270, 604800, 1201200, 4386816, 11277630, 49029120, 143896500, 348364800, 746876130, 2937876480, 8117240040, 18923520000, 39628338750, 76859228160, 140548508100
(list; graph; refs; listen; history; internal format)
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