51315
domain: N
Appears in sequences
- a(n) = Sum_{k=1..n} k*[ (n/k)*[ (n/k)*[ n/k ] ] ].at n=31A024933
- Numbers that are palindromic and divisible by 5.at n=36A043040
- Palindromes with exactly 4 distinct prime factors.at n=28A046394
- Palindromic Smith numbers.at n=27A098834
- Palindromic numbers that contain the sum of their digits as a substring.at n=39A121939
- Trajectory of 1496 under repeated application of the map defined in A053392.at n=1A328974
- Palindromic numbers that are also Niven numbers and Smith numbers.at n=4A334528