Number of permutations of [n] avoiding simultaneously consecutive patterns 123, 1432, 2431, and 3421.
A231211
Number of permutations of [n] avoiding simultaneously consecutive patterns 123, 1432, 2431, and 3421.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =46a(6) =177a(7) =790a(8) =4024a(9) =23056a(10) =146777a(11) =1027850a(12) =7852184a(13) =64985116a(14) =579191277a(15) =5530869310a(16) =56336971744a(17) =609708912976
External references
- oeis: A231211