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), (1, 0, -1), (1, 0, 1)}.
A148535
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), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =161a(7) =437a(8) =1597a(9) =4979a(10) =17731a(11) =58043a(12) =211817a(13) =731315a(14) =2667389a(15) =9354133a(16) =34895869a(17) =125833675a(18) =470388199a(19) =1710015661a(20) =6496866717a(21) =24060085297a(22) =91545064515a(23) =340787297207
External references
- oeis: A148535