-13515

Appears in sequences

• a(1) = 1; a(n) = -Sum_{k = 1..n-1} (n+k)!a(k)/(2k)!.at n=7A007683
• Triangle inverse to that in A046899.at n=37A046900
• Inverse Euler transform of Thue-Morse sequence A001285.at n=34A316149