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, 1, 0), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
A148963
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, 1, 0), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =104a(6) =408a(7) =1538a(8) =6182a(9) =25115a(10) =103973a(11) =437297a(12) =1865584a(13) =8026201a(14) =34960157a(15) =153287512a(16) =677730838a(17) =3016052369a(18) =13500654582a(19) =60768654839a(20) =274855397216
External references
- oeis: A148963