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

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

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.

Examples

			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.

Extensions

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