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), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
A151003
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), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =176a(5) =823a(6) =3923a(7) =18896a(8) =91764a(9) =447969a(10) =2197018a(11) =10808493a(12) =53314066a(13) =263518119a(14) =1304635500a(15) =6467863885a(16) =32100843512a(17) =159468346798a(18) =792819418523
External references
- oeis: A151003