Symmetric array read by antidiagonals: T(n,k) is the number of legal positions in Go on an n X k board.

A356049

Symmetric array read by antidiagonals: T(n,k) is the number of legal positions in Go on an n X k board.

Terms

    a(0) =1a(1) =5a(2) =5a(3) =15a(4) =57a(5) =15a(6) =41a(7) =489a(8) =489a(9) =41a(10) =113a(11) =4125a(12) =12675a(13) =4125a(14) =113a(15) =313a(16) =35117a(17) =321689a(18) =321689a(19) =35117a(20) =313a(21) =867a(22) =299681a(23) =8180343a(24) =24318165a(25) =8180343a(26) =299681a(27) =867a(28) =2401a(29) =2557605

External references