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, 0, 0), (0, 1, 0), (1, -1, -1), (1, -1, 0)}.
A148125
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, 0, 0), (0, 1, 0), (1, -1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =26a(6) =75a(7) =214a(8) =661a(9) =1991a(10) =6436a(11) =21020a(12) =69748a(13) =233784a(14) =807658a(15) =2805835a(16) =9816299a(17) =34870101a(18) =125488394a(19) =452757999a(20) =1647072420a(21) =6060766185a(22) =22413227647a(23) =83169470122a(24) =311182120714
External references
- oeis: A148125