Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
A148083
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =24a(6) =68a(7) =204a(8) =635a(9) =2048a(10) =6684a(11) =22581a(12) =77989a(13) =271706a(14) =968228a(15) =3500939a(16) =12729468a(17) =47024807a(18) =175664979a(19) =658360378a(20) =2498042454a(21) =9560670342a(22) =36669158456a(23) =142032179940a(24) =553961114253
External references
- oeis: A148083