Starting at the chess position shown, a(n) is the number of ways Black can make n consecutive moves, followed by a checkmate in one move by White.
A078993
Starting at the chess position shown, a(n) is the number of ways Black can make n consecutive moves, followed by a checkmate in one move by White.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =2a(6) =5a(7) =8a(8) =28a(9) =24a(10) =108a(11) =66a(12) =357a(13) =176a(14) =1088a(15) =464a(16) =3160a(17) =1218a(18) =8901a(19) =3192a(20) =24564a(21) =8360a(22) =66836a(23) =21890a(24) =180037a(25) =57312a(26) =481464a(27) =150048a(28) =1280736a(29) =392834
External references
- oeis: A078993