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, 1), (-1, 1, -1), (1, -1, -1), (1, 1, 0)}.
A148659
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, 1), (-1, 1, -1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =25a(5) =65a(6) =263a(7) =818a(8) =3480a(9) =11449a(10) =50576a(11) =175792a(12) =786179a(13) =2849879a(14) =12909894a(15) =48120645a(16) =220751593a(17) =841416548a(18) =3890986045a(19) =15126720815a(20) =70373188247a(21) =277921541613
External references
- oeis: A148659