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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
A149375
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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =47a(5) =164a(6) =695a(7) =2699a(8) =11928a(9) =48830a(10) =220914a(11) =940961a(12) =4321991a(13) =18937219a(14) =87972118a(15) =393301987a(16) =1843766751a(17) =8369121619a(18) =39519636049a(19) =181547249045a(20) =862251480517
External references
- oeis: A149375