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%I #32 Dec 17 2023 11:21:33
%S 1210,2020,21200,3211000,42101000,521001000,6210001000,72100001000,
%T 821000001000,9210000001000
%N 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.
%D E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
%H Tanya Khovanova, <a href="https://www.youtube.com/watch?v=lRfdMiURV4s">Can you solve the Leonardo da Vinci riddle?</a>, TED-Ed YouTube channel.
%e 72100001000 has 7 digits equal to "0", 2 digits equal to "1", 1 digit each "2" and "7" and no other digits.
%Y Autobiographical numbers up to 10 digits: A046043. Mutually-praising pairs: A138481 and A138482.
%K base,fini,full,nonn
%O 1,1
%A _Martin Fuller_, Mar 20 2008
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