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, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150408
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, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =94a(5) =365a(6) =1522a(7) =6317a(8) =27305a(9) =117730a(10) =521284a(11) =2305176a(12) =10382686a(13) =46739971a(14) =213238207a(15) =972787925a(16) =4482614090a(17) =20660903549a(18) =95970758823a(19) =445977751724
External references
- oeis: A150408