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), (0, 0, -1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150541
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), (0, 0, -1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =103a(5) =431a(6) =1855a(7) =8162a(8) =36536a(9) =165906a(10) =761186a(11) =3523172a(12) =16431550a(13) =77110432a(14) =363762487a(15) =1723943613a(16) =8203032788a(17) =39167716373a(18) =187591916040a(19) =900940280855
External references
- oeis: A150541