A116307 Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+3.

83, 77394229, 89158935, 36623663376237623663376337, 37633762366336633762366237, 62366237633663366237633763, 63376336623762376336623663, 86194223018927804587702130

Offset

1,1

Links

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

Example

89158935 * 89158936 = 79493157//79493160, where // denotes concatenation.

Crossrefs

Cf. A116099, A116301, A116308, A116314.

Sequence in context: A116263 A287686 A087532 * A093676 A221416 A130432

Adjacent sequences: A116304 A116305 A116306 * A116308 A116309 A116310

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved