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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148105
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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =27a(6) =79a(7) =242a(8) =770a(9) =2526a(10) =8482a(11) =29081a(12) =101381a(13) =358448a(14) =1282833a(15) =4638642a(16) =16923338a(17) =62222809a(18) =230338989a(19) =857789608a(20) =3211367100a(21) =12079381400a(22) =45627168971a(23) =172996707877a(24) =658150503220
External references
- oeis: A148105