Number of 9-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.
A187304
Number of 9-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.
Terms
- a(0) =0a(1) =0a(2) =54a(3) =2968a(4) =25716a(5) =87432a(6) =209700a(7) =399524a(8) =668522a(9) =1010572a(10) =1430378a(11) =1921532a(12) =2485628a(13) =3120300a(14) =3825896a(15) =4601996a(16) =5448634a(17) =6365780a(18) =7353434a(19) =8411596a(20) =9540266a(21) =10739444a(22) =12009130a(23) =13349324a(24) =14760026a(25) =16241236a(26) =17792954a(27) =19415180a(28) =21107914
External references
- oeis: A187304