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, 0), (0, 0, 1), (1, 0, -1)}.
A148291
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, 0), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =35a(6) =104a(7) =325a(8) =1001a(9) =3349a(10) =11096a(11) =38054a(12) =131934a(13) =465776a(14) =1662856a(15) =5991259a(16) =21938339a(17) =80418334a(18) =299671530a(19) =1117327758a(20) =4216093209a(21) =15951410354a(22) =60807769952a(23) =232918198206a(24) =895690678547
External references
- oeis: A148291