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, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 0)}.
A148179
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, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =91a(7) =247a(8) =877a(9) =2567a(10) =9614a(11) =29933a(12) =116257a(13) =378638a(14) =1514149a(15) =5106545a(16) =20883108a(17) =72470751a(18) =301746422a(19) =1072034351a(20) =4530557200a(21) =16417140603a(22) =70249343442a(23) =258899615482
External references
- oeis: A148179