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, -1, 0), (0, 1, -1), (1, 0, 1)}.
A148925
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, -1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =27a(5) =92a(6) =332a(7) =1214a(8) =4529a(9) =17483a(10) =68750a(11) =272787a(12) =1096343a(13) =4465373a(14) =18366370a(15) =76056243a(16) =317263740a(17) =1333111463a(18) =5635694858a(19) =23942198488a(20) =102192823018a(21) =438211699197
External references
- oeis: A148925