Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the generalized pattern 23-1; triangle T(n,k), n>=0, 0<=k<=A125811(n)-1, read by rows.
A260670
Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the generalized pattern 23-1; triangle T(n,k), n>=0, 0<=k<=A125811(n)-1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =1a(5) =15a(6) =6a(7) =3a(8) =52a(9) =32a(10) =23a(11) =10a(12) =3a(13) =203a(14) =171a(15) =152a(16) =98a(17) =62a(18) =22a(19) =11a(20) =1a(21) =877a(22) =944a(23) =984a(24) =791a(25) =624a(26) =392a(27) =240a(28) =111a(29) =55
External references
- oeis: A260670