Number of length n inversion sequences avoiding the patterns 010 and 102.

A374553

Number of length n inversion sequences avoiding the patterns 010 and 102.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =51a(6) =186a(7) =707a(8) =2763a(9) =11024a(10) =44714a(11) =183830a(12) =764374a(13) =3209031a(14) =13584217a(15) =57918257a(16) =248502212a(17) =1072159593a(18) =4648747281a(19) =20245772943a(20) =88524364619a(21) =388469248937

External references