Triangle read by rows: T(n,k) is the number of permutations of [n] having k blocks of odd length (0<=k<=n).
A180193
Triangle read by rows: T(n,k) is the number of permutations of [n] having k blocks of odd length (0<=k<=n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =0a(7) =3a(8) =0a(9) =3a(10) =2a(11) =0a(12) =11a(13) =0a(14) =11a(15) =0a(16) =14a(17) =0a(18) =53a(19) =0a(20) =53a(21) =6a(22) =0a(23) =96a(24) =0a(25) =309a(26) =0a(27) =309a(28) =0a(29) =78
External references
- oeis: A180193