28930

Appears in sequences

• Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors (excluding the proper divisor 1). Rearrangements which cause leading zeros are excluded.at n=16A086248
• Number of ways to place 6 nonattacking kings on an n X n cylindrical chessboard.at n=5A194654
• Numbers that are the sum of five fourth powers in three or more ways.at n=43A344243
• Numbers that are the sum of five fourth powers in exactly three ways.at n=41A344244
• a(n) = binomial(n,3) + 6*binomial(n,4) + 15*binomial(n,5) + 15*binomial(n,6).at n=12A382081