www.mikescher.com/www/statics/euler/Euler_Problem-055.php

<?php

return 
[
	'number'      => 55,
	'date'        => '2015-04-28',
	'title'       => 'Lychrel numbers',
	'abbreviated' => false,
	'steps'       => 10470329,
	'time'        => 2215,
	'width'       => 56,
	'height'      => 5,
	'value'       => 249,
];