Numbers k such that both k and the k-th prime have nonincreasing digits.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =11a(6) =20a(7) =21a(8) =64a(9) =82a(10) =83a(11) =84a(12) =86a(13) =98a(14) =100a(15) =331a(16) =720a(17) =730a(18) =732a(19) =810a(20) =821a(21) =843a(22) =921a(23) =933a(24) =940a(25) =942a(26) =970a(27) =982a(28) =983a(29) =1100