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), (0, 1, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
A151139
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), (0, 1, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =46a(4) =204a(5) =915a(6) =4218a(7) =19712a(8) =92635a(9) =439500a(10) =2097879a(11) =10045349a(12) =48320283a(13) =233190823a(14) =1127688064a(15) =5467521609a(16) =26562531710a(17) =129235130543a(18) =629811090988
External references
- oeis: A151139