1234480

Appears in sequences

• Number of n X 5 0..1 arrays with rows unimodal and columns nondecreasing.at n=23A225007
• Number of tilings of a 12 X n rectangle using 2*n copies of the disconnected shape [ooo___ooo].at n=34A323423
• Lesser of a pair of amicable numbers k < m such that s(k) = m and s(m) = k, where s(k) = A162296(k) - k is the sum of aliquot divisors of k that have a square factor.at n=21A357495