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, 0), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A148501
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, 0), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =15a(5) =33a(6) =111a(7) =299a(8) =1005a(9) =2899a(10) =9631a(11) =30333a(12) =103763a(13) =345293a(14) =1180645a(15) =3990591a(16) =13855337a(17) =48420601a(18) =171794343a(19) =608614059a(20) =2163454701a(21) =7734113089a(22) =27936343669a(23) =101650409209a(24) =371092684689
External references
- oeis: A148501