A168387 a(n) = the smallest number whose Spanish name contains n distinct letters of the alphabet. 2<=n<=22

8, 1, 0, 16, 4, 19, 22, 31, 24, 42, 142, 239, 1042, 1239, 2389, 10389, 310589, 1310589, 1000001310589, 1000000000000000000000001000001310589, 1000001000000000000000000000001000001310589

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

Table of n, a(n) for n=2..22.

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