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A229186 Beginning position of n in the decimal expansion of the Champernowne constant. 2
11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 1, 16, 18, 20, 22, 24, 26, 28, 30, 15, 34, 2, 38, 40, 42, 44, 46, 48, 50, 17, 37, 56, 3, 60, 62, 64, 66, 68, 70, 19, 39, 59, 78, 4, 82, 84, 86, 88, 90, 21, 41, 61, 81, 100, 5, 104, 106, 108, 110, 23 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Ignoring the initial 0 to the left of the decimal point.
Same as A031297 but including the a(0) term.
LINKS
Eric Weisstein's World of Mathematics, Champernowne Constant Digits
Eric Weisstein's World of Mathematics, Constant Digit Scanning
PROG
(Python)
from itertools import count, islice
def agen():
k, chap = 1, ".1"
for n in count(0):
target = str(n)
while chap.find(target) == -1: k += 1; chap += str(k)
yield chap.find(target)
print(list(islice(agen(), 70))) # Michael S. Branicky, Oct 06 2022
CROSSREFS
Cf. A033307 (decimal expansion of the Champernowne constant).
Cf. A072290 (number of digits in the decimal expansion of the Champernowne constant that must be scanned to encounter all n-digit strings).
Cf. A031297 (same sequence but omitting the a(0) term).
Sequence in context: A010197 A010196 A039617 * A214676 A010198 A307245
KEYWORD
nonn,base,less
AUTHOR
Eric W. Weisstein, Sep 15 2013
STATUS
approved

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Last modified February 28 19:33 EST 2024. Contains 370400 sequences. (Running on oeis4.)