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, 0, -1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
A148327
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, 0, -1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =127a(7) =422a(8) =1435a(9) =4840a(10) =17338a(11) =62435a(12) =225190a(13) =837159a(14) =3126319a(15) =11765631a(16) =44783683a(17) =171773846a(18) =664157911a(19) =2575562439a(20) =10077583703a(21) =39670893129a(22) =156317183566a(23) =620651825974
External references
- oeis: A148327