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, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148211
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, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =36a(6) =123a(7) =422a(8) =1556a(9) =5797a(10) =22512a(11) =88244a(12) =355082a(13) =1441038a(14) =5951551a(15) =24763384a(16) =104316842a(17) =442258945a(18) =1892124241a(19) =8139630740a(20) =35259782511a(21) =153461173363a(22) =671582239139
External references
- oeis: A148211