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, -1, 1), (-1, 0, -1), (-1, 1, 0), (1, 0, 0)}.
A148051
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, -1, 1), (-1, 0, -1), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =63a(7) =133a(8) =488a(9) =1134a(10) =4159a(11) =9977a(12) =38619a(13) =96551a(14) =380001a(15) =972913a(16) =3913896a(17) =10241310a(18) =41846263a(19) =111378893a(20) =461040755a(21) =1244667953a(22) =5208010325a(23) =14229194099a(24) =60121447699a(25) =165980137990a(26) =706675809803
External references
- oeis: A148051