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), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149738
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), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =77a(5) =305a(6) =1391a(7) =5997a(8) =27977a(9) =125933a(10) =595293a(11) =2743171a(12) =13083667a(13) =61244179a(14) =294145111a(15) =1392517293a(16) =6723830223a(17) =32097784775a(18) =155628202165a(19) =747653078115
External references
- oeis: A149738