63630

Appears in sequences

• Composite numbers k such that the difference between the odd and even aliquot parts of k divides k.at n=33A066193
• Number of 4-cycles in the n-tetrahedral graph.at n=10A289792
• Triangle read by rows: T(n,k) is the number of endofunctions on [n] whose second-smallest component has size exactly k; n >= 0, 0 <= k <= max(0,n-1).at n=24A350079
• Primitive terms of A023197 that are of the form 4u+2.at n=42A388020