a(n) = Sum_{k<=n} A007955(k) * A000027(n-k+1) = Sum_{k<=n} A007955(k) * (n-k+1), where A007955(m) = product of divisors of m.
A174934
a(n) = Sum_{k<=n} A007955(k) * A000027(n-k+1) = Sum_{k<=n} A007955(k) * (n-k+1), where A007955(m) = product of divisors of m.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =24a(4) =43a(5) =98a(6) =160a(7) =286a(8) =439a(9) =692a(10) =956a(11) =2948a(12) =4953a(13) =7154a(14) =9580a(15) =13030a(16) =16497a(17) =25796a(18) =35114a(19) =52432a(20) =70191a(21) =88434a(22) =106700a(23) =456742a(24) =806909a(25) =1157752a(26) =1509324a(27) =1882848a(28) =2256401a(29) =3439954
External references
- oeis: A174934