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), (0, 1, 0), (1, 0, -1), (1, 1, 0)}.
A150167
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), (0, 1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =297a(6) =1221a(7) =5172a(8) =22380a(9) =98629a(10) =440778a(11) =1993639a(12) =9105180a(13) =41934404a(14) =194498667a(15) =907672953a(16) =4258455930a(17) =20072573135a(18) =95004367273a(19) =451307179835
External references
- oeis: A150167