The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A044787 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A044787

Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n+1.
(history; published version)

#7 by Harvey P. Dale at Fri Dec 09 12:54:27 EST 2022

STATUS

editing

approved

#6 by Harvey P. Dale at Fri Dec 09 12:54:24 EST 2022

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {7, 4}]>0, 1, 0], {n, 4000}], {1, 0}][[All, 1]] (* Harvey P. Dale, Dec 09 2022 *)

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 18:56:46 EDT 2012

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

Clark Kimberling

Discussion

Fri Mar 30

18:56

OEIS Server: https://oeis.org/edit/global/285

#4 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004

NAME

String Numbers n such that string 7,4 occurs in the base 10 representation of n but not of n+1.

KEYWORD

nonn,base,new

#3 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

nonn,base,new

AUTHOR

Clark Kimberling, (ck6(AT)evansville.edu)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

String 7,4 occurs in the base 10 representation of n, but not of n+1.

KEYWORD

nonn,base,new

AUTHOR

Clark Kimberling, ck6@cedar.(AT)evansville.edu

#1 by N. J. A. Sloane at Sat Dec 11 03:00:00 EST 1999

NAME

String 7,4 occurs in the base 10 representation of n, but not of n+1.

DATA

74, 174, 274, 374, 474, 574, 674, 749, 774, 874, 974, 1074, 1174, 1274, 1374, 1474, 1574, 1674, 1749, 1774, 1874, 1974, 2074, 2174, 2274, 2374, 2474, 2574, 2674, 2749, 2774, 2874, 2974, 3074, 3174, 3274, 3374, 3474, 3574

OFFSET

1,1

KEYWORD

nonn,base

AUTHOR

Clark Kimberling, ck6@cedar.evansville.edu

STATUS

approved