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, 1, 1), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
A149010
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, 1, 1), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =125a(6) =493a(7) =1985a(8) =8180a(9) =34302a(10) =145926a(11) =627524a(12) =2726280a(13) =11936938a(14) =52633883a(15) =233489865a(16) =1041206147a(17) =4664657374a(18) =20984288491a(19) =94744961342a(20) =429195209302
External references
- oeis: A149010