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, 0, 0), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
A148645
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, 0, 0), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =23a(5) =61a(6) =259a(7) =779a(8) =3436a(9) =11116a(10) =50120a(11) =170775a(12) =782661a(13) =2770992a(14) =12847938a(15) =46827027a(16) =218941164a(17) =816506936a(18) =3842355699a(19) =14601045443a(20) =69068143075a(21) =266598722383
External references
- oeis: A148645