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, 1), (0, 1, 0), (1, -1, -1), (1, -1, 0)}.
A148141
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, 1), (0, 1, 0), (1, -1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =82a(7) =260a(8) =800a(9) =2619a(10) =8769a(11) =30113a(12) =104125a(13) =368767a(14) =1332471a(15) =4812536a(16) =17702055a(17) =65889593a(18) =246466567a(19) =928990097a(20) =3539220977a(21) =13559356521a(22) =52132706845a(23) =202134499150a(24) =787843395550
External references
- oeis: A148141