n times n+4 gives the concatenation of two numbers m and m-4.
A116260
n times n+4 gives the concatenation of two numbers m and m-4.
Terms
- a(0) =9a(1) =99a(2) =999a(3) =9999a(4) =99999a(5) =999999a(6) =9999999a(7) =99999999a(8) =999999999a(9) =9999999999a(10) =36363636362a(11) =45454545453a(12) =54545454544a(13) =63636363635a(14) =72727272726a(15) =81818181817a(16) =90909090908a(17) =99999999999a(18) =999999999999
External references
- oeis: A116260