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, 1, 1), (1, -1, -1), (1, 0, 0)}.
A148265
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, 1, 1), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =33a(6) =121a(7) =331a(8) =1288a(9) =3816a(10) =15360a(11) =48275a(12) =199143a(13) =651625a(14) =2739341a(15) =9243475a(16) =39389281a(17) =136285772a(18) =586860958a(19) =2073159057a(20) =9003292399a(21) =32364139558a(22) =141560810053a(23) =516376441034
External references
- oeis: A148265