53942

Appears in sequences

• G.f.: (1+x)^2/[(1-x)^4(1-x-x^2)^3].at n=9A001926
• Number of 5-tuples of different integers from [ 1,n ] with no common factors among quadruples.at n=25A015644
• Number of 2Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.at n=12A202743
• Number of semi-sums of integer partitions of n.at n=31A366738