Number of ways to place k nonattacking anassas on an n X n chess board. Triangle T(n,k) read by rows.
A378561
Number of ways to place k nonattacking anassas on an n X n chess board. Triangle T(n,k) read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =3a(6) =1a(7) =9a(8) =22a(9) =14a(10) =1a(11) =16a(12) =82a(13) =156a(14) =90a(15) =1a(16) =25a(17) =220a(18) =840a(19) =1366a(20) =738a(21) =1a(22) =36a(23) =485a(24) =3100a(25) =9796a(26) =14288a(27) =7364a(28) =1a(29) =49
External references
- oeis: A378561