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, -1, 1), (-1, 0, 0), (0, 1, 0), (1, 0, 0)}.
A149907
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, -1, 1), (-1, 0, 0), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =45a(5) =143a(6) =483a(7) =1644a(8) =5848a(9) =21178a(10) =77716a(11) =290588a(12) =1097869a(13) =4182986a(14) =16151078a(15) =62672479a(16) =245500460a(17) =967557537a(18) =3835676351a(19) =15285272154a(20) =61245921696a(21) =246253276079a(22) =995260779078
External references
- oeis: A149907