2,2

Numerators of sequence a[ 2, n ] in (a[ i, j ])^2 where a[ i, j ] = S(i, j)/BellNumber(i) if j<=i, 0 if j>i

Sequence in context: A165402 A135120 A027812 this_sequence A020267 A064322 A126902

Adjacent sequences: A027505 A027506 A027507 this_sequence A027509 A027510 A027511

nonn

Olivier Gerard (olivier.gerard(AT)gmail.com)