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, 1)}.
A150437
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, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =100a(5) =390a(6) =1665a(7) =7021a(8) =30495a(9) =132702a(10) =586888a(11) =2603104a(12) =11643605a(13) =52321106a(14) =236264822a(15) =1070743980a(16) =4871310316a(17) =22226431162a(18) =101697222558a(19) =466481434158
External references
- oeis: A150437