Smallest natural number requiring n words in English (as spoken in England).

A001167

Smallest natural number requiring n words in English (as spoken in England).

Terms

    a(0) =1a(1) =21a(2) =21000a(3) =101a(4) =121a(5) =1101a(6) =1121a(7) =21121a(8) =101101a(9) =101121a(10) =121121a(11) =1101121a(12) =1121121a(13) =21121121a(14) =101101121a(15) =101121121a(16) =121121121a(17) =1101121121a(18) =1121121121a(19) =21121121121a(20) =101101121121a(21) =101121121121a(22) =121121121121

External references