253252

Appears in sequences

• Number of increasing sequences of Goldbach type with maximal element n.at n=21A008929
• a(n) = Sum_{i=0..n-1} a(i)*a(n-i), with a(0) = 1 and a(1) = 4.at n=10A014433
• Number of subsets S of T={0,1,2,...,n} such that each element of T is the sum of two (not necessarily distinct) elements of S.at n=20A066062
• The number of symmetric numerical sets with odd Frobenius number and no small atoms.at n=20A164047