Lower of pair of consecutive happy numbers.

Terms

a(0) =31a(1) =129a(2) =192a(3) =262a(4) =301a(5) =319a(6) =367a(7) =391a(8) =565a(9) =622a(10) =637a(11) =655a(12) =912a(13) =931a(14) =1029a(15) =1092a(16) =1114a(17) =1121a(18) =1151a(19) =1184a(20) =1211a(21) =1221a(22) =1257a(23) =1274a(24) =1299a(25) =1332a(26) =1447a(27) =1474a(28) =1511a(29) =1527