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A097222 Numbers n such that for some k there exist k numbers a1,a2, ...,ak that concatenations of them is equal to n and sum of them is equal to Pi(n). 2
15, 27, 39, 130, 131, 252, 370, 489, 1195, 2345, 3484, 4619, 5752, 6879 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
9642459 is in the sequence because Pi(9642459)=9+642459
in fact a1=9 & a2=642459.
CROSSREFS
Sequence in context: A349175 A145195 A096022 * A004069 A110978 A274433
KEYWORD
nonn,base
AUTHOR
Farideh Firoozbakht, Aug 05 2004
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)