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, 0, -1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A150906
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, 0, -1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =141a(5) =579a(6) =2637a(7) =11658a(8) =53730a(9) =245184a(10) =1145615a(11) =5316641a(12) =25100260a(13) =117875813a(14) =560486938a(15) =2655943749a(16) =12697363185a(17) =60572829215a(18) =290883443805
External references
- oeis: A150906