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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A151028
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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =40a(4) =200a(5) =888a(6) =4440a(7) =20640a(8) =103200a(9) =491072a(10) =2455360a(11) =11842560a(12) =59212800a(13) =288052864a(14) =1440264320a(15) =7047424000a(16) =35237120000a(17) =173139514368a(18) =865697571840
External references
- oeis: A151028