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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, 1)}.
A151199
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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =53a(4) =242a(5) =1131a(6) =5375a(7) =25770a(8) =124613a(9) =606018a(10) =2959699a(11) =14507794a(12) =71303815a(13) =351256141a(14) =1733644863a(15) =8569727681a(16) =42418344280a(17) =210196707443
External references
- oeis: A151199