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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. 7
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
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
KEYWORD
base,fini,full,nonn
AUTHOR
Martin Fuller, Mar 20 2008
STATUS
approved

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Last modified June 25 21:12 EDT 2024. Contains 373712 sequences. (Running on oeis4.)