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), (-1, 0, 0), (0, 0, -1), (0, 1, 1), (1, 0, 0)}.
A150163
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), (-1, 0, 0), (0, 0, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =286a(6) =1150a(7) =4676a(8) =19516a(9) =82325a(10) =352551a(11) =1523146a(12) =6642454a(13) =29173778a(14) =128957103a(15) =573244772a(16) =2560570574a(17) =11488400595a(18) =51743747415a(19) =233877257170
External references
- oeis: A150163