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), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
A148716
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), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =24a(5) =70a(6) =264a(7) =871a(8) =3445a(9) =12209a(10) =49965a(11) =186006a(12) =778897a(13) =3005994a(14) =12798041a(15) =50759402a(16) =218926582a(17) =887015121a(18) =3865566214a(19) =15933181036a(20) =70025009803a(21) =292737848952
External references
- oeis: A148716