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), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A150882
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), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =149a(5) =671a(6) =3124a(7) =14572a(8) =69027a(9) =327738a(10) =1568883a(11) =7526367a(12) =36282157a(13) =175229271a(14) =848963109a(15) =4119569655a(16) =20033898783a(17) =97555323988a(18) =475811775727
External references
- oeis: A150882