A116211 Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 9.

1953, 3115, 6153, 1016574047215119910181525023, 2440558249789368730986767575, 2560156942576450203707692923, 4639822375038697733267413875, 4868700733912235016077891029

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Example

6153//6160 = 7840 * 7849, where // denotes concatenation.

Crossrefs

Cf. A116203, A116210, A116216, A116342.

Sequence in context: A249324 A249217 A155809 * A234560 A232389 A209946

Adjacent sequences: A116208 A116209 A116210 * A116212 A116213 A116214

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved