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), (0, 1, 0), (1, 1, 0), (1, 1, 1)}.
A151173
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), (0, 1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =215a(5) =958a(6) =4382a(7) =20253a(8) =94757a(9) =446425a(10) =2117730a(11) =10094620a(12) =48331541a(13) =232211836a(14) =1119142516a(15) =5407718471a(16) =26190394725a(17) =127097125981a(18) =617874724630
External references
- oeis: A151173