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, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148093
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, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =25a(6) =70a(7) =212a(8) =639a(9) =2000a(10) =6451a(11) =21617a(12) =71791a(13) =246306a(14) =858806a(15) =3031680a(16) =10707284a(17) =38611784a(18) =140802398a(19) =514700655a(20) =1893610027a(21) =7056144208a(22) =26475930759a(23) =99365898413a(24) =375942742181
External references
- oeis: A148093