A058152 - OEIS

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A058152

Triangle: Number of asymmetric monoids of order n with k idempotents, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).

0

1, 1, 1, 0, 3, 1, 0, 6, 8, 2, 0, 13, 36, 35, 7, 0, 93, 186, 297, 220, 37, 0, 2593, 1396, 2559, 3214, 1746, 263, 0

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..29.

Index entries for sequences related to monoids

EXAMPLE

1; 1,1; 0,3,1; 0,6,8,2; 0,13,36,35,7; ...

CROSSREFS

Row sums give A058136.

Sequence in context: A257673 A137651 A248826 * A058140 A074678 A363976

Adjacent sequences: A058149 A058150 A058151 * A058153 A058154 A058155

KEYWORD

nonn,tabl,more

AUTHOR

Christian G. Bower, Nov 14 2000

STATUS

approved