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, -1, 0), (1, 0, 0)}.
A148189
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, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =30a(6) =95a(7) =285a(8) =957a(9) =3169a(10) =11155a(11) =39558a(12) =144487a(13) =537139a(14) =2027543a(15) =7787338a(16) =30251332a(17) =119109358a(18) =473788518a(19) =1903999547a(20) =7721744366a(21) =31574203219a(22) =130129452868a(23) =540068476342
External references
- oeis: A148189