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), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149539
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), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =51a(5) =179a(6) =707a(7) =2631a(8) =10657a(9) =41565a(10) =169871a(11) =679473a(12) =2811927a(13) =11431875a(14) =47657045a(15) =196290401a(16) =823740077a(17) =3422948805a(18) =14440656985a(19) =60463251011a(20) =256164359217
External references
- oeis: A149539