Permutations avoiding the consecutive patterns 4312 and 4213.

A177478

Permutations avoiding the consecutive patterns 4312 and 4213.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =100a(6) =540a(7) =3388a(8) =24248a(9) =195048a(10) =1742860a(11) =17127880a(12) =183617280a(13) =2132433940a(14) =26669752928a(15) =357375269160

External references