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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A148897
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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =107a(6) =402a(7) =1553a(8) =6212a(9) =24929a(10) =102365a(11) =425855a(12) =1796311a(13) =7595044a(14) =32541726a(15) =140436897a(16) =608624581a(17) =2653313910a(18) =11639255932a(19) =51259909476a(20) =226553582890
External references
- oeis: A148897