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, 0), (-1, 1, 0), (-1, 1, 1), (1, 0, 0)}.
A148548
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, 0), (-1, 1, 0), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =21a(5) =44a(6) =179a(7) =405a(8) =1835a(9) =4490a(10) =19779a(11) =49829a(12) =232721a(13) =610882a(14) =2788715a(15) =7427785a(16) =35253935a(17) =96368290a(18) =448865903a(19) =1237270005a(20) =5931202577a(21) =16649102672a(22) =78553909015a(23) =221640074309
External references
- oeis: A148548