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A099743
Number of permutations with exactly 1 valley which avoid the pattern 1324.
+0
1
0, 0, 2, 15, 75, 313, 1179, 4161, 14051, 45993, 147195, 463345, 1440723, 4438905, 13582955, 41350977, 125404611, 379228489, 1144370139, 3447856017, 10375942835, 31198607385, 93749962827, 281584384225, 845476670115
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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