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)}.
A148207
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) =12a(5) =35a(6) =125a(7) =425a(8) =1628a(9) =6034a(10) =24212a(11) =94981a(12) =393857a(13) =1606466a(14) =6821063a(15) =28606253a(16) =123619645a(17) =529230526a(18) =2318216292a(19) =10082257498a(20) =44639650166a(21) =196562094912a(22) =877864578830
External references
- oeis: A148207