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, 1, 1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150963
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, 1, 1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =166a(5) =727a(6) =3548a(7) =16332a(8) =80629a(9) =381024a(10) =1891196a(11) =9076846a(12) =45180577a(13) =219017831a(14) =1091957861a(15) =5329439061a(16) =26597315767a(17) =130440635128a(18) =651386378673
External references
- oeis: A150963