Number of non-alternating patterns of length n.

A350252

Number of non-alternating patterns of length n.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =7a(4) =53a(5) =439a(6) =4121a(7) =43675a(8) =519249a(9) =6867463a(10) =100228877a(11) =1602238783a(12) =27866817297a(13) =524175098299

External references