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), (-1, 1, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148495
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), (-1, 1, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =83a(6) =348a(7) =1499a(8) =6623a(9) =29805a(10) =136080a(11) =628537a(12) =2930993a(13) =13772875a(14) =65132877a(15) =309654749a(16) =1478735723a(17) =7088395315a(18) =34089167561a(19) =164401035964a(20) =794796779867
External references
- oeis: A148495