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, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148116
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, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =30a(6) =92a(7) =308a(8) =1063a(9) =3780a(10) =13953a(11) =52464a(12) =201883a(13) =791572a(14) =3147547a(15) =12702666a(16) =51861591a(17) =213937957a(18) =891232927a(19) =3743220743a(20) =15841828369a(21) =67512847684a(22) =289488115049
External references
- oeis: A148116