a(n) = Sum_{d|n} A007955(d) * A000027(n/d) = Sum_{d|n} A007955(d) * (n/d), where A007955(m) = product of divisors of m.
A174932
a(n) = Sum_{d|n} A007955(d) * A000027(n/d) = Sum_{d|n} A007955(d) * (n/d), where A007955(m) = product of divisors of m.
Terms
- a(0) =1a(1) =4a(2) =6a(3) =16a(4) =10a(5) =54a(6) =14a(7) =96a(8) =45a(9) =130a(10) =22a(11) =1860a(12) =26a(13) =238a(14) =270a(15) =1216a(16) =34a(17) =6048a(18) =38a(19) =8300a(20) =504a(21) =550a(22) =46a(23) =335688a(24) =175a(25) =754a(26) =864a(27) =22484a(28) =58a(29) =811050
External references
- oeis: A174932