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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 0), (1, 1, 0)}.
A149370
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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =46a(5) =160a(6) =643a(7) =2575a(8) =10729a(9) =44624a(10) =190291a(11) =823169a(12) =3608545a(13) =15902256a(14) =70658022a(15) =316491884a(16) =1428784897a(17) =6481876262a(18) =29534326134a(19) =135186987516a(20) =621730458462
External references
- oeis: A149370