a(n) = Sum_{k<=n} A007955(k) * A008683(n-k+1) = Sum_{k<=n} A007955(k) * mu(n-k+1), where A007955(m) = product of divisors of m.
A174942
a(n) = Sum_{k<=n} A007955(k) * A008683(n-k+1) = Sum_{k<=n} A007955(k) * mu(n-k+1), where A007955(m) = product of divisors of m.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =3a(4) =-7a(5) =22a(6) =-36a(7) =14a(8) =-44a(9) =-29a(10) =-91a(11) =1525a(12) =-1692a(13) =-1686a(14) =109a(15) =-1246a(16) =534a(17) =2818a(18) =-5769a(19) =1034a(20) =-5042a(21) =-16561a(22) =5185a(23) =315777a(24) =-321633a(25) =-338860a(26) =5749a(27) =-319896a(28) =318256a(29) =441483
External references
- oeis: A174942