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, 0, -1), (0, 0, 1), (1, 0, -1)}.
A148505
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, 0, -1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =34a(6) =121a(7) =275a(8) =1007a(9) =2570a(10) =9421a(11) =26616a(12) =95957a(13) =294055a(14) =1038947a(15) =3391255a(16) =11823571a(17) =40442112a(18) =140588537a(19) =496156778a(20) =1735133067a(21) =6234168269a(22) =22062124755a(23) =79968394842a(24) =287166124521
External references
- oeis: A148505