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, -1), (0, 0, 1), (1, 0, -1)}.
A148119
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, -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) =606a(9) =1772a(10) =5659a(11) =18055a(12) =57650a(13) =190806a(14) =643903a(15) =2158908a(16) =7409215a(17) =25810603a(18) =89837412a(19) =316495463a(20) =1130343744a(21) =4037596315a(22) =14539324740a(23) =52909811198a(24) =192837217446a(25) =706592984332
External references
- oeis: A148119