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, 0), (-1, 0, 1), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150948
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, 0), (-1, 0, 1), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =153a(5) =673a(6) =3056a(7) =13961a(8) =64691a(9) =302034a(10) =1419777a(11) =6707589a(12) =31848340a(13) =151777512a(14) =725705977a(15) =3479885667a(16) =16729718128a(17) =80604358661a(18) =389127748054
External references
- oeis: A150948