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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150846
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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =610a(6) =2756a(7) =12514a(8) =57848a(9) =268436a(10) =1257928a(11) =5915546a(12) =27991248a(13) =132843454a(14) =633110652a(15) =3024787472a(16) =14495342620a(17) =69608204042a(18) =335037749148
External references
- oeis: A150846