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 A168387 a(n) = the smallest number whose Spanish name contains n distinct letters of the alphabet. 2<=n<=22 0
 8, 1, 0, 16, 4, 19, 22, 31, 24, 42, 142, 239, 1042, 1239, 2389, 10389, 310589, 1310589, 1000001310589, 1000000000000000000000001000001310589, 1000001000000000000000000000001000001310589 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS The letters f, g, h, j, k, ss +-, and w are unused. "ch" and "ll" are each one letter Table of names for a(n) .n..name.............................................letters used .-------------------------------------------------------- 2. Ocho...............................................o ch 3. Uno................................................uno 4. Cero...............................................cero 5. Dieciseis .........................................diecs 6. Cuatro.............................................cuatro 7. Diecinueve.........................................diecnuv 8. Veintidos..........................................veintdos 9. Treinta y uno......................................treinayuo 10. Veinticuatro.......................................veintcuaro 11. Cuarenta y dos.....................................cuarentydos 12. Ciento cuarenta y dos..............................cientouaryds 13. Doscientos treinta y nueve.........................doscientrayuv 14. Mil cuarenta y dos.................................milcuarentydos 15. Mil doscientos treinta y nueve.....................mildoscentrayuv 16. Dos mil trescientos ochenta y nueve................dosmiltrecchnayuv 17. Diez mil trescientos ochenta y nueve...............diezmltrscnochayuv 18. Trescientos diez mil quinientos ochenta y nueve....trescinodzmlquchayv 19. Un millon trescientos diez mil quinientos ........lltrescinodzmlquchayv ....ochenta y nueve 20. Un billon trescientos diez mil.....................btrescinodzmlquchayv ....quinientos ochenta y nueve 21. Un sextillon un billon trescientos ................xbtrescinodzmlquchayv ....diez mil quinientos ochenta y nueve 22. Un septillon un sextillon un billon trescientos....pxbtrescinodzmlquchayv ....diez mil quinientos ochenta y nueve LINKS EXAMPLE a(6) = 4, because "cuatro" contains six distinct letters of the alphabet. CROSSREFS Cf. A168137 (American English version) Sequence in context: A021929 A176459 A248878 * A050466 A095893 A095886 Adjacent sequences:  A168384 A168385 A168386 * A168388 A168389 A168390 KEYWORD fini,full,nonn,word AUTHOR Claudio Meller, Nov 24 2009 STATUS approved

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Last modified March 25 21:57 EDT 2019. Contains 321477 sequences. (Running on oeis4.)