Numbers k such that k concatenated with k+1 is a square.

Terms

a(0) =183a(1) =328a(2) =528a(3) =715a(4) =6099a(5) =13224a(6) =40495a(7) =106755a(8) =453288a(9) =2066115a(10) =2975208a(11) =22145328a(12) =28027683a(13) =110213248a(14) =110667555a(15) =147928995a(16) =178838403a(17) =226123528a(18) =275074575a(19) =333052608a(20) =378698224a(21) =445332888a(22) =446245635