A058137 - OEIS

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A058137

Triangle read by rows: monoids of order n with k idempotents.

6

1, 1, 1, 1, 3, 3, 2, 9, 14, 10, 1, 32, 63, 86, 46, 2, 219, 406, 694, 665, 251, 1, 5585, 3331, 6343, 8582, 6035, 1682, 5

(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; 1,3,3; 2,9,14,10; 1,32,63,86,46; ...

CROSSREFS

Row sums give A058129. Main diagonal: A058112(n-1). Columns 1-3: A000001, A058138, A058139.

Sequence in context: A128504 A193822 A202699 * A250304 A330307 A256916

Adjacent sequences: A058134 A058135 A058136 * A058138 A058139 A058140

KEYWORD

nonn,tabl,more

AUTHOR

Christian G. Bower, Nov 14 2000

STATUS

approved