First elements of the pairs listed in A134514.

Terms

a(0) =12a(1) =122a(2) =1222a(3) =4615a(4) =12222a(5) =122222a(6) =402046a(7) =603069a(8) =869041a(9) =1222222a(10) =12222222a(11) =55887353a(12) =122222222a(13) =1222222222a(14) =3672179309a(15) =5007665212a(16) =5248419783a(17) =5731222831a(18) =7699085901a(19) =12222222222a(20) =122222222222a(21) =320016003248