24903680

Appears in sequences

• a(n) = 2^(n-2)*binomial(n+1,2).at n=17A052482
• a(1) = 4; a(n) = smallest composite number greater than the sum of all previous terms.at n=23A070232
• Sequence associated with a(n) = 2*a(n-1) + k*(k+2)*a(n-2).at n=18A080929
• a(n) = -2*a(n-1) + 4*a(n-3), with a(0) = 1, a(1) = -2, a(2) = 4.at n=27A099211
• Expansion of e.g.f. cosh(x)^2*(x+x^2/2).at n=20A385601