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, 0), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
A151115
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, 0), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =193a(5) =846a(6) =3794a(7) =17324a(8) =79827a(9) =371081a(10) =1739023a(11) =8197012a(12) =38811857a(13) =184576867a(14) =881070710a(15) =4218219250a(16) =20249486092a(17) =97449118013a(18) =469963128463
External references
- oeis: A151115