799933domain: NAppears in sequencesNumerators of the sum of the n-th partial sums of the expansions of e and 1/e.at n=10A196080Numerators of the sum of the n-th partial sums of the expansions of e and 1/e.at n=11A196080a(n) is the numerator of Sum_{k=0..n} 1 / (2*k)!.at n=5A354334