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A222319 Number of classes created in S_n by the {132, 231}{213, 312}-equivalence. 0
1, 2, 4, 10, 26, 76, 234, 782, 2804, 10972, 47246, 224648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

W. Kuszmaul, Counting permutations modulo pattern-replacement equivalences for three-letter patterns, http://web.mit.edu/primes/materials/2012/Kuszmaul.pdf, 2012.

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Sequence in context: A229053 A229068 A000085 * A047653 A148100 A149815

Adjacent sequences:  A222316 A222317 A222318 * A222320 A222321 A222322

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Feb 17 2013

EXTENSIONS

Notation edited by William Kuszmaul, Mar 06 2013

STATUS

approved

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Last modified November 13 11:09 EST 2018. Contains 317133 sequences. (Running on oeis4.)