8388560

Appears in sequences

• Number of ordered pairs of complementary subsets of an n-set with both subsets of cardinality at least 2.at n=23A052515
• Records in A101119, which forms the nonzero differences of A006519 and A003484.at n=19A101120
• If an array is made of columns of -nacci sequences, fibo-, tribo- etc. all starting w. 1,1,2 etc, the NW to SE diagonals can be extended by computation. The above is diagonal 7. See A159741 for details.at n=17A159743