-3001

Appears in sequences

• Alternating row sums of array A078739 ((2,2)-Stirling2).at n=5A090211
• The main diagonal of the array of A141425 and its higher order differences.at n=13A141516
• a(n) = Sum_{k=0..floor(n/10)} (-1)^k * binomial(n-5*k,5*k).at n=20A348310