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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
A149409
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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =197a(6) =847a(7) =3606a(8) =15852a(9) =70792a(10) =319238a(11) =1458059a(12) =6712464a(13) =31103382a(14) =145188780a(15) =680497081a(16) =3206436620a(17) =15163714935a(18) =71961913140a(19) =342618244047
External references
- oeis: A149409