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, 0, 0), (-1, 1, -1), (0, 0, 1), (1, 0, -1)}.
A148118
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, 0, 0), (-1, 1, -1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =26a(6) =70a(7) =205a(8) =596a(9) =1752a(10) =5449a(11) =17424a(12) =54722a(13) =177079a(14) =592755a(15) =1962134a(16) =6546075a(17) =22465233a(18) =77286652a(19) =264757142a(20) =923848587a(21) =3261028077a(22) =11438600315a(23) =40466392606a(24) =145203933975a(25) =519739374933
External references
- oeis: A148118