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A027501
First diagonal of A027496.
0
1, 1, 4, 4, 45, 121680, 895412700, 765208749487, 23131167341635600, 1241298775946837183769648, 88337130010856531512760631670, 1708369803301228434760503165381979211286000
OFFSET
1,3
FORMULA
Numerators of sequence a[ n, n ] in (a[ i, j ])^3 where a[ i, j ] = S(i, j)/BellNumber(i) if j<=i, 0 if j>i
CROSSREFS
Sequence in context: A269913 A197933 A198005 * A341108 A189102 A220778
KEYWORD
nonn
STATUS
approved