Numbers k such that k*(k+2) is the concatenation of two numbers m and m+3.

Terms

a(0) =452a(1) =547a(2) =690a(3) =855a(4) =4381a(5) =5618a(6) =72729a(7) =346532a(8) =653467a(9) =9090907a(10) =94117645a(11) =334665332a(12) =336032386a(13) =378253327a(14) =390977441a(15) =439928490a(16) =483516485a(17) =516483514a(18) =560071509a(19) =609022558a(20) =621746672a(21) =663967613a(22) =665334667