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A027507
First column of A027495.
0
1, 3, 27, 173, 2213, 1239065, 1178661599, 537440137205, 4498684093801517, 397866367316299082571, 521505356993412536753131, 132101530036167237378528466705275, 1271578712351105027090700191735899429869, 33189191375129970683761258266358875688948789
OFFSET
1,2
FORMULA
Numerators of sequence a[ 1, n ] in (a[ i, j ])^2 where a[ i, j ] = S(i, j)/BellNumber(i) if j<=i, 0 if j>i.
CROSSREFS
Cf. A027495.
Sequence in context: A056361 A141442 A053932 * A297670 A378867 A220820
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Nov 06 2019
STATUS
approved