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, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150576
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, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =461a(6) =2049a(7) =9263a(8) =42590a(9) =197954a(10) =928679a(11) =4387192a(12) =20849236a(13) =99555146a(14) =477306096a(15) =2296206297a(16) =11078942316a(17) =53589815828a(18) =259791441971
External references
- oeis: A150576