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, 0), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148427
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, 0), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =18a(5) =62a(6) =238a(7) =916a(8) =3706a(9) =15243a(10) =64409a(11) =276189a(12) =1203838a(13) =5305479a(14) =23641944a(15) =106267870a(16) =481560161a(17) =2197119864a(18) =10086780977a(19) =46558844757a(20) =215964339529
External references
- oeis: A148427