Square analog to Keith numbers.

Terms

a(0) =1a(1) =9a(2) =37a(3) =40a(4) =43a(5) =62a(6) =70a(7) =74a(8) =160a(9) =1264a(10) =1952a(11) =2847a(12) =12799a(13) =16368a(14) =16584a(15) =42696a(16) =83793a(17) =97415a(18) =182011a(19) =352401a(20) =889871a(21) =925356a(22) =1868971a(23) =1881643a(24) =3661621a(25) =7645852a(26) =15033350a(27) =21655382a(28) =63288912a(29) =88192007