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), (0, -1, 1), (1, 0, 0)}.
A148033
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), (0, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =51a(7) =131a(8) =421a(9) =1207a(10) =3878a(11) =12057a(12) =40118a(13) =130680a(14) =441485a(15) =1497749a(16) =5185040a(17) =17987644a(18) =63307623a(19) =224664807a(20) =803719579a(21) =2891171202a(22) =10485345696a(23) =38262391388a(24) =140319647872a(25) =517205785586
External references
- oeis: A148033