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# Template:Kbn

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## Purpose

Display numbers of the form kbn±1 in text-mode.

## Usage

This template uses one to four unnamed parameters which are defined as follows:

• Only if the first parameter is + or ±, the '+'/'±'-value is displayed, otherwise the '-'-value of the number.

Three more parameters containing numbers/variables can be given and used as follows:

• one parameter: the n-value is given and displays as 2n±1
• two parameters: the k- and n-value are given and display as k•2n±1
• three parameters: the k-, b- and n-value are given and display as kbn±1

## Examples

• one parameter: `{{Kbn|123}}`: 2123-1
• two parameters: `{{Kbn|3|123}}`: 3•2123-1
• three parameters: `{{Kbn|3|5|123}}`: 3•5123-1

With '+'-sign:

• `{{Kbn|+|123}}`: 2123+1
• `{{Kbn|+|13|123}}`: 13•2123+1
• `{{Kbn|+|3|5|123}}`: 3•5123+1

With '±'-sign:

• `{{Kbn|±|123}}`: 2123±1
• `{{Kbn|±|13|123}}`: 13•2123±1
• `{{Kbn|±|3|5|123}}`: 3•5123±1

Others:

• To display only 10123+1, set the k-value to '1': `{{Kbn|+|1|10|123}}` (or `{{Kbn|1|10|123}}` to get 10123-1).

Also possible:

• `{{Kbn|2<sup>{{Vn}}</sup>}}`: 22n-1
• `{{Kbn|k|b|n}}`: kbn-1
• `{{Kbn|+|k|b|n}}`: kbn+1
• `{{Kbn|1|b|n}}`: bn-1
• `{{Kbn|+|(b-1)|b|n}}`: (b-1)bn+1