A111576 Number of minimal non-2-stack-sortable permutations of length n.

0, 0, 0, 0, 0, 0, 22, 51, 146

Offset: 1

Author

N. J. A. Sloane, Nov 17 2005

Keywords

• nonn
• more

References

• V. Vatter, The Enumeration and Structure of Permutation Classes, Ph. D. Dissertation, Rutgers Univ., Math. Dept., 2006.

Links

• M. D. Atkinson, M. M. Murphy and N. Ruskuc, Sorting with two ordered stacks in series, Theoret. Comput. Sci. 289 (2002), 205-223.
• R. E. Tarjan, Sorting using networks of queues and stacks, JACM, 19 (1972), 341-346.