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), (0, 1, -1), (1, 0, 1)}.
A148583
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), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =54a(6) =167a(7) =528a(8) =1672a(9) =5471a(10) =17981a(11) =60139a(12) =203024a(13) =687400a(14) =2361146a(15) =8129436a(16) =28138474a(17) =98079577a(18) =342877988a(19) =1203994543a(20) =4242357232a(21) =14998885029a(22) =53192103457a(23) =189077433312a(24) =674049702154
External references
- oeis: A148583