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A038015
Number of pointed (distinguished element) idempotent groupoids.
3
1, 4, 378, 2798336, 3973658465625, 1842282678468471349824, 433296503176904197061300041939288, 74235003800935257803650942510752495927455127552
OFFSET
1,2
FORMULA
Here fixF[n] = n(1)*Product_{i, j >= 1}(Sum_{d|[i, j]}(d*n(d))^((i, j)*n(i)*n(j)-(i=j)n(i))).
CROSSREFS
Sequence in context: A154682 A292195 A154569 * A279525 A003753 A193130
KEYWORD
nonn
AUTHOR
Christian G. Bower, May 15 1998
STATUS
approved