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), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
A148140
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), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =79a(7) =239a(8) =717a(9) =2308a(10) =7297a(11) =24044a(12) =80190a(13) =272169a(14) =937998a(15) =3238896a(16) =11395781a(17) =40306202a(18) =144327012a(19) =518753441a(20) =1877343545a(21) =6847992964a(22) =25113561672a(23) =92664740665a(24) =342898523397
External references
- oeis: A148140