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A116722
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Number of permutations of length n which avoid the patterns 312, 1324, 3421; or avoid the patterns 312, 1324, 2341, etc.
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1
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1, 2, 5, 12, 25, 47, 82, 135, 212, 320, 467, 662, 915, 1237, 1640, 2137, 2742, 3470, 4337, 5360, 6557, 7947, 9550, 11387, 13480, 15852, 18527, 21530, 24887, 28625, 32772, 37357, 42410, 47962, 54045, 60692, 67937, 75815, 84362, 93615, 103612
(list; graph; refs; listen; history; internal format)
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