Bihappy numbers: numbers that reach 1 under iteration of the sum-of-squares-of-two-digits map s_2.

Terms

a(0) =1a(1) =10a(2) =100a(3) =103a(4) =301a(5) =367a(6) =608a(7) =806a(8) =1000a(9) =1030a(10) =1826a(11) =2363a(12) =2618a(13) =2896a(14) =3010a(15) =3056a(16) =3640a(17) =4036a(18) =4498a(19) =4596a(20) =5294a(21) =5630a(22) =6080a(23) =6323a(24) =6703a(25) =6791a(26) =8060a(27) =8484a(28) =9167a(29) =9452