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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150299
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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =98a(5) =412a(6) =1840a(7) =8154a(8) =37224a(9) =171160a(10) =793154a(11) =3716730a(12) =17465560a(13) =82664746a(14) =392713914a(15) =1872141724a(16) =8959486334a(17) =42973967858a(18) =206712819136a(19) =996416355570
External references
- oeis: A150299