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), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A150925
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), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =149a(5) =632a(6) =2911a(7) =13006a(8) =60909a(9) =279756a(10) =1324645a(11) =6189865a(12) =29539507a(13) =139630146a(14) =670290631a(15) =3194608107a(16) =15405629210a(17) =73879980430a(18) =357568409984
External references
- oeis: A150925