A094801
Numbers k such that k is a term of A014778, but k-1 and k+1 are not.
Original entry on oeis.org
13199998, 117463825, 513199998, 1111111110
Offset: 1
- M. Protat, Des Olympiades a l'Agregation, Nombre de "1", Problem 89, pp. 182-183, Ellipses, Paris 1997.
A101640
Positive integers n for which n = f(n), where f(n) is the total number of 3's required when writing out all numbers between 0 and n.
Original entry on oeis.org
371599983, 371599984, 371599985, 371599986, 371599987, 371599988, 371599989, 371599990, 371599991, 371599992, 500000000, 10000000000, 10371599983, 10371599984, 10371599985, 10371599986, 10371599987, 10371599988
Offset: 1
a(1) = 371599983, since writing out all numbers from 0 to 371599983 requires that 371599983 3's be used and since 371599983 is the first such positive integer.
a(4) = 371599986 because the number of 3's in the decimal digits of the numbers from 1 to 371599986 is 371599986 and this is the 4th such number.
More terms from Daniel Hirschberg (dan(AT)ics.uci.edu), May 05 2007
A101641
Positive integers n for which n = f(n), where f(n) is the total number of 4's required when writing out all numbers between 0 and n.
Original entry on oeis.org
499999984, 499999985, 499999986, 499999987, 499999988, 499999989, 499999990, 499999991, 499999992, 499999993, 500000000, 10000000000, 10499999984, 10499999985, 10499999986, 10499999987, 10499999988, 10499999989
Offset: 1
a(1) = 499999984, since writing out all numbers from 0 to 499999984 requires that 499999984 4's be used and since 499999984 is the first such positive integer.
a(4) = 499999987 because the number of 4's in the decimal digits of the numbers from 1 to 499999987 is 499999987 and this is the 4th such number.
More terms from Daniel Hirschberg (dan(AT)ics.uci.edu), May 05 2007
A130428
List of numbers n such that n is equal to the number of 6's in the decimal digits of all numbers <= n.
Original entry on oeis.org
0, 9500000000, 9628399986, 9628399987, 9628399988, 9628399989, 9628399990, 9628399991, 9628399992, 9628399993, 9628399994, 9628399995, 10000000000, 19500000000, 19628399986, 19628399987, 19628399988, 19628399989
Offset: 1
a(5)=9628399988 because the number of 6's in the decimal digits of the numbers from 0 to 9628399988 is 9628399988 and this is the 5th such number.
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.
Original entry on oeis.org
0, 9465000000, 9471736170, 9500000000, 9757536170, 9965000000, 9971736170, 10000000000, 19465000000, 19471736170, 19500000000, 19757536170, 19965000000, 19971736170, 20000000000, 29465000000, 29471736170
Offset: 1
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.
A130430
List of numbers n such that n is equal to the number of 8's in the decimal digits of all numbers <= n.
Original entry on oeis.org
0, 9465000000, 9486799989, 9486799990, 9486799991, 9486799992, 9486799993, 9486799994, 9486799995, 9486799996, 9486799997, 9497400000, 9498399989, 9498399990, 9498399991, 9498399992, 9498399993, 9498399994, 9498399995
Offset: 1
a(5)=9486799991 because the number of 8's in the decimal digits of the numbers from 0 to 9486799991 is 9486799991 and this is the 5th such number.
A101639
Positive integers n for which n = f(n), where f(n) is the total number of 2's required when writing out all numbers between 0 and n.
Original entry on oeis.org
28263827, 35000000, 242463827, 500000000, 528263827, 535000000, 10000000000, 10028263827, 10035000000, 10242463827, 10500000000, 10528263827, 10535000000
Offset: 1
a(1) = 28263827 since writing out all numbers from 0 to 28263827 requires that 28263827 2's be used and since 28263827 is the first such positive integer.
a(4) = 500000000 because the number of 2's in the decimal digits of the numbers from 1 to 500000000 is 500000000 and this is the 4th such number.
More terms from Daniel Hirschberg (dan(AT)ics.uci.edu), May 05 2007
A130427
Complete list of all 5 numbers n such that n is equal to the number of 5's in the decimal digits of all numbers <= n.
Original entry on oeis.org
0, 10000000000, 20000000000, 30000000000, 40000000000
Offset: 1
a(5) = 40000000000 because the number of 5's in the decimal digits of the numbers from 0 to 40000000000 is 40000000000 and this is the 5th such number.
A130431
Complete list of all 9 numbers n such that n is equal to the number of 9's in the decimal digits of all numbers <= n.
Original entry on oeis.org
0, 10000000000, 20000000000, 30000000000, 40000000000, 50000000000, 60000000000, 70000000000, 80000000000
Offset: 1
a(5)=40000000000 because the number of 9's in the decimal digits of the numbers from 0 to 40000000000 is 40000000000 and this is the 5th such number.
A130432
For digit n from 1 to 9, a(n) = the number of numbers m such that m is equal to the number of n's in the decimal digits of all numbers <= m.
Original entry on oeis.org
84, 14, 36, 48, 5, 72, 49, 344, 9
Offset: 1
a(3)=36 because there are 36 numbers m such that m is equal to the number of 3's in the decimal digits of all numbers <= m.
Showing 1-10 of 30 results.
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