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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
A150171
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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =76a(5) =299a(6) =1246a(7) =5291a(8) =23180a(9) =102766a(10) =464418a(11) =2115781a(12) =9761718a(13) =45299638a(14) =212074088a(15) =997141485a(16) =4718451470a(17) =22402002642a(18) =106868910086a(19) =511158778549
External references
- oeis: A150171