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), (0, -1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150993
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), (0, -1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =168a(5) =773a(6) =3624a(7) =17170a(8) =82107a(9) =395927a(10) =1919236a(11) =9343878a(12) =45659222a(13) =223779631a(14) =1099440501a(15) =5412768563a(16) =26694974082a(17) =131851281756a(18) =652076574086
External references
- oeis: A150993