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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150113
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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =70a(5) =262a(6) =1032a(7) =4112a(8) =16957a(9) =70398a(10) =298251a(11) =1270136a(12) =5487853a(13) =23805317a(14) =104335318a(15) =458787703a(16) =2033142273a(17) =9034828874a(18) =40391226251a(19) =181002360289a(20) =814984158174
External references
- oeis: A150113