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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
A149361
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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =44a(5) =159a(6) =639a(7) =2483a(8) =10352a(9) =42294a(10) =180524a(11) =759732a(12) =3300850a(13) =14177275a(14) =62395356a(15) =272032994a(16) =1209154365a(17) =5332085353a(18) =23887620632a(19) =106288427057a(20) =479225640782
External references
- oeis: A149361