a(1) = 20; a(n+1) = a(n) + sum of decimal digits of a(n).

Terms

a(0) =20a(1) =22a(2) =26a(3) =34a(4) =41a(5) =46a(6) =56a(7) =67a(8) =80a(9) =88a(10) =104a(11) =109a(12) =119a(13) =130a(14) =134a(15) =142a(16) =149a(17) =163a(18) =173a(19) =184a(20) =197a(21) =214a(22) =221a(23) =226a(24) =236a(25) =247a(26) =260a(27) =268a(28) =284a(29) =298