A138480 - OEIS

A138480

Autobiographical numbers: the first digit specifies how many 0's in the number, the next digit specifies how many 1's, etc. This version is not limited to 10 digits.

1210, 2020, 21200, 3211000, 42101000, 521001000, 6210001000, 72100001000, 821000001000, 9210000001000

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

REFERENCES

E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.

LINKS

Table of n, a(n) for n=1..10.

Tanya Khovanova, Can you solve the Leonardo da Vinci riddle?, TED-Ed YouTube channel.

EXAMPLE

72100001000 has 7 digits equal to "0", 2 digits equal to "1", 1 digit each "2" and "7" and no other digits.

CROSSREFS

Autobiographical numbers up to 10 digits: A046043. Mutually-praising pairs: A138481 and A138482.

Sequence in context: A358538 A359049 A358711 * A047627 A252213 A258727

Adjacent sequences: A138477 A138478 A138479 * A138481 A138482 A138483

KEYWORD

base,fini,full,nonn

AUTHOR

Martin Fuller, Mar 20 2008

STATUS

approved