A116112 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A116112

Numbers k such that k concatenated with k-7 gives the product of two numbers which differ by 7.

17, 35, 10408517, 45884051, 62918301, 1116290522645838319925, 1491109615209578451401, 2254276950187476704727, 2758431647767103545151, 3768131911733856383477, 4434103687048263321737, 5230580700713956424051

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Also numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 5.

Also numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 3.

Also numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 1.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

62918301//62918300 = 79321055 * 79321060, where // denotes concatenation.

62918301//62918304 = 79321056 * 79321059.

62918301//62918306 = 79321057 * 79321058.

CROSSREFS

Cf. A116107, A115426, A116113, A116119, A116243.

Cf. A116163, A115429, A116158, A116281.

Cf. A116171, A116177, A116179, A116185, A116309, A115430, A116322.

Sequence in context: A041574 A144534 A041576 * A190755 A098849 A319059

Adjacent sequences: A116109 A116110 A116111 * A116113 A116114 A116115

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

EXTENSIONS

Edited by N. J. A. Sloane, Apr 15 2007

STATUS

approved