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), (0, -1, 0), (1, 0, 0), (1, 1, 1)}.
A150492
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), (0, -1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =101a(5) =400a(6) =1669a(7) =7056a(8) =30381a(9) =131480a(10) =576861a(11) =2550207a(12) =11340229a(13) =50684650a(14) =227890405a(15) =1028839731a(16) =4660351199a(17) =21184482784a(18) =96616842171a(19) =441748660923
External references
- oeis: A150492