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, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
A148154
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, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =95a(7) =298a(8) =1006a(9) =3389a(10) =11909a(11) =41892a(12) =151248a(13) =547242a(14) =2013692a(15) =7428090a(16) =27714657a(17) =103659360a(18) =390818670a(19) =1476869632a(20) =5613303220a(21) =21379805046a(22) =81781927372a(23) =313417411878
External references
- oeis: A148154