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 A029471 Numbers k that divide the (left) concatenation of all numbers <= k written in base 2 (most significant digit on left). 141
 1, 85, 145, 245, 1189, 356717, 19590671, 35741759, 791822369, 25313027035 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 3*10^10. LINKS Table of n, a(n) for n=1..10. Index entries for related sequences MATHEMATICA b = 2; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[#, b], c], b], #] &] (* Robert Price, Mar 12 2020 *) PROG (Python) from itertools import count def a029471(): total = 0 power_of_two = 1 index_of_two = 0 length_of_string = 0 for n in count(1): total += (n<

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Last modified May 29 11:49 EDT 2024. Contains 372940 sequences. (Running on oeis4.)