Number of pairs of terms of the sequence A228126 less than 10^n.
A239290
Number of pairs of terms of the sequence A228126 less than 10^n.
Terms
- a(0) =4a(1) =7a(2) =8a(3) =19a(4) =55a(5) =149a(6) =497a(7) =1799a(8) =6696a(9) =26109a(10) =106953
External references
- oeis: A239290