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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 0, 0)}.
A148084
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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =24a(6) =68a(7) =209a(8) =645a(9) =2110a(10) =7049a(11) =23776a(12) =84050a(13) =297599a(14) =1072298a(15) =3959753a(16) =14643758a(17) =55107010a(18) =209726918a(19) =802227580a(20) =3108865505a(21) =12121597818a(22) =47579974069a(23) =188383403156a(24) =749420131640
External references
- oeis: A148084