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, 0), (-1, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
A149461
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, 0), (-1, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =51a(5) =195a(6) =817a(7) =3432a(8) =14911a(9) =65235a(10) =290915a(11) =1307274a(12) =5937716a(13) =27149739a(14) =125023447a(15) =578769694a(16) =2693341575a(17) =12586059554a(18) =59046681200a(19) =277963746827
External references
- oeis: A149461