419432

Appears in sequences

• Number of subsets of {1,2,3,...,n} that sum to 0 mod 10.at n=22A068031
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 20.at n=23A068041
• Unsigned row sums of triangle A118404.at n=21A118406
• a(n) = A137505(2n) + A137505(2n+1).at n=20A167291
• a(n) = A137505(2n) + A137505(2n+1).at n=21A167291