Number of unordered pairs of natural numbers k1, k2 such that their product is an n-digit number and has the same multiset of digits as in both k1 and k2.
A370676
Number of unordered pairs of natural numbers k1, k2 such that their product is an n-digit number and has the same multiset of digits as in both k1 and k2.
Terms
- a(0) =0a(1) =0a(2) =3a(3) =15a(4) =98a(5) =596a(6) =3626a(7) =22704a(8) =146834a(9) =983476a(10) =6846451a(11) =49364315a(12) =367660050
External references
- oeis: A370676