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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 1, -1), (1, 0, 0)}.
A148569
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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =19a(5) =51a(6) =171a(7) =529a(8) =1873a(9) =6282a(10) =23178a(11) =82111a(12) =312399a(13) =1151347a(14) =4486888a(15) =17037327a(16) =67688801a(17) =263109380a(18) =1061979573a(19) =4206602984a(20) =17204567768a(21) =69217318299a(22) =286278353533
External references
- oeis: A148569