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, 1), (0, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A150270
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, 1), (0, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =90a(5) =392a(6) =1772a(7) =8214a(8) =38738a(9) =184988a(10) =891524a(11) =4326426a(12) =21107204a(13) =103402592a(14) =508224356a(15) =2504495212a(16) =12368275018a(17) =61186339454a(18) =303126885560
External references
- oeis: A150270