login
A130429
List of all numbers n such that n is equal to the number of 7's in the decimal digits of all numbers <= n.
14
0, 9465000000, 9471736170, 9500000000, 9757536170, 9965000000, 9971736170, 10000000000, 19465000000, 19471736170, 19500000000, 19757536170, 19965000000, 19971736170, 20000000000, 29465000000, 29471736170
OFFSET
1,2
COMMENTS
A finite sequence with 49 terms.
LINKS
Graeme McRae, May 26 2007, Table of n, a(n) for n = 1..49 (full sequence)
Tanya Khovanova and Gregory Marton, Archive Labeling Sequences, arXiv:2305.10357 [math.HO], 2023. See p. 4.
EXAMPLE
a(5)=9757536170 because the number of 7's in the decimal digits of the numbers from 0 to 9757536170 is 9757536170 and this is the 5th such number.
CROSSREFS
Cf. A014778 for proof these sequences are finite; Also A101639, A101640, A101641, A130427, A130428, A130430, A130431; Cf. A130432 for the number of numbers in these sequences.
Sequence in context: A178558 A134448 A048053 * A130430 A172610 A225143
KEYWORD
base,fini,full,nonn
AUTHOR
Graeme McRae, May 26 2007
STATUS
approved