148969

Appears in sequences

• Numerator of Sum_{k=1..n} 1/(k * 2^k).at n=7A068566
• C(2n-1,n-1) mod n^4.at n=26A099908
• Numerator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=2.at n=3A145611
• a(n) = numerator of polynomial of genus 1 and level n for m = 2.at n=8A145656
• a(n) = binomial(2*c-1, c-1) (mod c^4), where c is the n-th composite number.at n=16A298946