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, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
A148240
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, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =110a(7) =367a(8) =1243a(9) =4266a(10) =14979a(11) =54636a(12) =199011a(13) =734030a(14) =2756839a(15) =10450319a(16) =39836796a(17) =153059496a(18) =593960500a(19) =2316916479a(20) =9077686257a(21) =35778018898a(22) =141845770750a(23) =564450779427
External references
- oeis: A148240