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, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148090
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, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =24a(6) =74a(7) =214a(8) =695a(9) =2166a(10) =7106a(11) =23361a(12) =80689a(13) =278290a(14) =986215a(15) =3470804a(16) =12422826a(17) =44857992a(18) =164333810a(19) =605851165a(20) =2248012785a(21) =8356195207a(22) =31310333219a(23) =118096170532a(24) =448467623116
External references
- oeis: A148090