A116120 Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 1.

7, 55, 5255, 6295, 75511, 92137, 5551405, 7943911, 1257669432489239675, 2148743977942130765, 2877834685014859837, 4164942361780146967, 10235898967817894552965, 15389481849681116007757

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Crossrefs

Cf. A116115, A116121, A116134, A116251.

Sequence in context: A305282 A197228 A009521 * A056719 A038855 A097254

Adjacent sequences: A116117 A116118 A116119 * A116121 A116122 A116123

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved