A116131 Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 6.

20, 31, 14564, 38239, 69919, 120395, 426436, 902596, 7478020, 9090220, 6671332084, 8114264059, 8482227259, 9900250996, 2244338786836, 2490577152964, 2509440638591, 2769448208395, 7012067592220

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Example

9900250996//9900250992 = 9950000498 * 9950000504, where // denotes concatenation.

Crossrefs

Cf. A116125, A116130, A116132, A115429, A116262.

Sequence in context: A077340 A077343 A218793 * A212050 A075035 A032352

Adjacent sequences: A116128 A116129 A116130 * A116132 A116133 A116134

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved