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), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150013
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), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =65a(5) =237a(6) =967a(7) =3984a(8) =16160a(9) =68745a(10) =296712a(11) =1262510a(12) =5540252a(13) =24489806a(14) =107196022a(15) =478859777a(16) =2150448033a(17) =9584178330a(18) =43349477053a(19) =196821411031a(20) =888311338529
External references
- oeis: A150013