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, 0, -1), (1, 1, 1)}.
A149232
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, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =32a(5) =110a(6) =360a(7) =1163a(8) =4112a(9) =14066a(10) =47848a(11) =171382a(12) =601488a(13) =2101436a(14) =7600784a(15) =27098643a(16) =96279392a(17) =350734058a(18) =1264010472a(19) =4542868898a(20) =16640111312a(21) =60442510244a(22) =219059021360a(23) =805881760158
External references
- oeis: A149232