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, 0), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A148798
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, 0), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =86a(6) =278a(7) =1008a(8) =3689a(9) =13682a(10) =52296a(11) =197227a(12) =773129a(13) =3046086a(14) =12052354a(15) =48408204a(16) =193513935a(17) =787775457a(18) =3217911649a(19) =13176702706a(20) =54428194105a(21) =224345229457a(22) =934409171556
External references
- oeis: A148798