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, 1, -1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150917
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, 1, -1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =32a(4) =149a(5) =627a(6) =2941a(7) =13209a(8) =62687a(9) =290048a(10) =1389629a(11) =6540502a(12) =31550069a(13) =150162266a(14) =727976787a(15) =3492066553a(16) =16992947285a(17) =81987733624a(18) =400130137529
External references
- oeis: A150917