42825

Appears in sequences

• Number of antichains in the first n elements of the infinite Boolean lattice.at n=36A132581
• a(1)=1, a(n) = a(n-1) + n^3 if n odd, a(n) = a(n-1) + n^5 if n is even.at n=8A140156
• Number of (n+2) X (2+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=8A252689
• Numbers x whose 10's complements y have the same sum of divisors of x, with x <> y.at n=8A300796