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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 0)}.
A150621
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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =113a(5) =491a(6) =2201a(7) =10076a(8) =46852a(9) =220491a(10) =1047338a(11) =5012115a(12) =24131162a(13) =116756686a(14) =567248282a(15) =2765433191a(16) =13521407189a(17) =66277140987a(18) =325563517576
External references
- oeis: A150621