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, 1), (0, 0, 1), (1, 1, -1)}.
A148496
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, 1), (0, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =77a(6) =297a(7) =1158a(8) =4760a(9) =19615a(10) =83170a(11) =354235a(12) =1537155a(13) =6694459a(14) =29509806a(15) =130528377a(16) =582259997a(17) =2605232262a(18) =11727542598a(19) =52934218258a(20) =240011811917
External references
- oeis: A148496