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A014887 n is equal to the number of 1's in all numbers <= n written in base 7. 0
1, 3930, 6044, 61879, 137256 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Module[{nn=137300, dc}, dc=Accumulate[DigitCount[Range[nn], 7, 1]]; Position[ Thread[ {Range[nn], dc}], _?(#[[1]]==#[[2]]&), 1, Heads-> False]]//Flatten (* Harvey P. Dale, Oct 10 2021 *)
CROSSREFS
Sequence in context: A335789 A250671 A179139 * A251823 A031822 A288894
KEYWORD
nonn,base,fini,full
AUTHOR
EXTENSIONS
List proved complete by Hugo van der Sanden (cf. A014886).
STATUS
approved

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Last modified April 21 01:42 EDT 2024. Contains 371850 sequences. (Running on oeis4.)