Number of permutations of [n] in which the length of every increasing run is 0 or 1 (mod 10).

A322283

Number of permutations of [n] in which the length of every increasing run is 0 or 1 (mod 10).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =2a(11) =22a(12) =242a(13) =2002a(14) =13442a(15) =77506a(16) =397826a(17) =1862146a(18) =8085506a(19) =32978946a(20) =127758774a(21) =482490294a(22) =2015041314a(23) =13111486674a(24) =144226353414

External references