136723

Appears in sequences

• Total sum of minimum block sizes in all partitions of n-set.at n=9A097147
• Number T(n,k) of entries in the k-th blocks of all set partitions of [n] when blocks are ordered by increasing lengths (and increasing smallest elements); triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=45A319298
• Triangle read by rows: T(n,k) = number of tilings of a n X k rectangle using 2 X 2 and 1 X 1 tiles and right trominoes, n >= 0, k=0..n.at n=39A353963
• Number of tilings of a 3 X n rectangle using 2 X 2 and 1 X 1 tiles and right trominoes.at n=8A353965