Eight bishops and one elephant on a 3 X 3 chessboard: a(n)= (3^(n+1)-Jacobsthal(n+1))-(3^n-Jacobsthal(n)), with Jacobsthal=A001045.
A175659
Eight bishops and one elephant on a 3 X 3 chessboard: a(n)= (3^(n+1)-Jacobsthal(n+1))-(3^n-Jacobsthal(n)), with Jacobsthal=A001045.
Terms
- a(0) =1a(1) =6a(2) =16a(3) =52a(4) =156a(5) =476a(6) =1436a(7) =4332a(8) =13036a(9) =39196a(10) =117756a(11) =353612a(12) =1061516a(13) =3185916a(14) =9560476a(15) =28686892a(16) =86071596a(17) =258236636a(18) =774753596a(19) =2324348172a(20) =6973219276a(21) =20920007356a(22) =62760721116a(23) =188283561452a(24) =564853480556
External references
- oeis: A175659