Numbers whose square is the concatenation of two numbers k and k-4.
A115443
Numbers whose square is the concatenation of two numbers k and k-4.
Terms
- a(0) =81a(1) =8157a(2) =9801a(3) =467347a(4) =532654a(5) =998001a(6) =76450589a(7) =99980001a(8) =7801738415a(9) =8593817623a(10) =9208120793a(11) =9999800001a(12) =346667333467a(13) =401461854015a(14) =598538145986a(15) =653332666534a(16) =945207479453a(17) =999998000001
External references
- oeis: A115443