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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
A148797
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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =83a(6) =298a(7) =998a(8) =3889a(9) =13971a(10) =54308a(11) =206572a(12) =814236a(13) =3160726a(14) =12741671a(15) =50085798a(16) =204433734a(17) =817602541a(18) =3353224962a(19) =13598332084a(20) =56149216881a(21) =229527402171a(22) =954687076546
External references
- oeis: A148797