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), (0, 0, -1), (1, -1, 0), (1, 1, 1)}.
A149694
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), (0, 0, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =67a(5) =275a(6) =1167a(7) =5067a(8) =22417a(9) =100259a(10) =454043a(11) =2073865a(12) =9545453a(13) =44216595a(14) =205951423a(15) =963817729a(16) =4529495875a(17) =21365271985a(18) =101107615673a(19) =479890273057
External references
- oeis: A149694