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A235460 a(1)=2. For n>1, assume a(n-1) has decimal expansion abcdefghij (with at most ten digits, where some of j,i,h, ... may be missing). Then a(n) = sum 11...1 (with a 1's) + 22...2 (with b 2's) + 33...3 (with c 3's) + ... 1
2, 11, 3, 111, 6, 111111, 21, 13, 223, 366, 555666, 1733331, 2224228 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See A235400 for the analogous sequence where we number the digits starting with 9 at the rightmost digit.
REFERENCES
Rodolfo Kurchan, Problems with repdigits, to appear in Proceedings of Gathering for Gardner 2014 conference
LINKS
EXAMPLE
2 means two 1's = 11; 11 means one 1 + one 2 = 3; 3 means 111; 111 means 1+2+3 = 6; 6 means 111111 = 1+2+3+4+5+6 = 21; 21 means 11+2 = 13; etc.
CROSSREFS
Cf. A235400.
Sequence in context: A109858 A082266 A070840 * A082264 A070532 A038217
KEYWORD
nonn,base
AUTHOR
Rodolfo Kurchan, Jan 10 2014
EXTENSIONS
Edited by N. J. A. Sloane, Jan 24 2014
STATUS
approved

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Last modified June 21 04:30 EDT 2024. Contains 373540 sequences. (Running on oeis4.)