Number of inversion sequences of length n avoiding the consecutive patterns 010, 021, 120, and 210.
A328431
Number of inversion sequences of length n avoiding the consecutive patterns 010, 021, 120, and 210.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =53a(6) =214a(7) =960a(8) =4701a(9) =24873a(10) =141147a(11) =853641a(12) =5472642a(13) =37024569a(14) =263342224a(15) =1962835806a(16) =15288074104a(17) =124120865849
External references
- oeis: A328431