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), (1, -1, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150992
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), (1, -1, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =171a(5) =770a(6) =3625a(7) =16924a(8) =80595a(9) =382918a(10) =1837819a(11) =8819773a(12) =42571079a(13) =205627890a(14) =996794721a(15) =4836699211a(16) =23525392935a(17) =114539663040a(18) =558627741653
External references
- oeis: A150992