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), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149800
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), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =87a(5) =363a(6) =1735a(7) =7717a(8) =37377a(9) =172405a(10) =842961a(11) =3969177a(12) =19518485a(13) =93212797a(14) =460143557a(15) =2218880423a(16) =10983882619a(17) =53341437199a(18) =264580362679
External references
- oeis: A149800