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, 1), (-1, 0, 1), (1, -1, -1), (1, 0, 0), (1, 1, -1)}.
A148149
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, 1), (-1, 0, 1), (1, -1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =97a(7) =300a(8) =1077a(9) =3634a(10) =13653a(11) =49031a(12) =190864a(13) =716619a(14) =2864542a(15) =11113948a(16) =45338516a(17) =180423941a(18) =748010246a(19) =3037549738a(20) =12759948361a(21) =52676833687a(22) =223710004285a(23) =936214898900
External references
- oeis: A148149