Number T(n,k) of occurrences of k in a (signed) displacement set of a permutation of [n]; triangle T(n,k), n>=1, 1-n<=k<=n-1, read by rows.
A306461
Number T(n,k) of occurrences of k in a (signed) displacement set of a permutation of [n]; triangle T(n,k), n>=1, 1-n<=k<=n-1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =3a(8) =2a(9) =6a(10) =10a(11) =13a(12) =15a(13) =13a(14) =10a(15) =6a(16) =24a(17) =42a(18) =56a(19) =67a(20) =76a(21) =67a(22) =56a(23) =42a(24) =24a(25) =120a(26) =216a(27) =294a(28) =358a(29) =411
External references
- oeis: A306461