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, -1), (-1, 1, 1), (1, 0, 0)}.
A148055
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, -1), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =68a(7) =147a(8) =558a(9) =1308a(10) =4840a(11) =11638a(12) =45142a(13) =112918a(14) =431806a(15) =1095775a(16) =4299562a(17) =11168048a(18) =43431360a(19) =113876158a(20) =449752342a(21) =1197311782a(22) =4700292130a(23) =12596627212a(24) =49945553674a(25) =135283990390a(26) =534123243068
External references
- oeis: A148055