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, 0), (-1, 0, -1), (0, -1, 1), (0, 0, 1), (1, 1, 0)}.
A150188
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, 0), (-1, 0, -1), (0, -1, 1), (0, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =77a(5) =294a(6) =1176a(7) =4763a(8) =19717a(9) =82867a(10) =351623a(11) =1508591a(12) =6523496a(13) =28396178a(14) =124410591a(15) =547816367a(16) =2423461096a(17) =10766562754a(18) =48003764190a(19) =214752543843a(20) =963633578716
External references
- oeis: A150188