www.mikescher.com/www/statics/euler/Euler_Problem-031.php

<?php

return 
[
	'number'      => 31,
	'date'        => '2014-09-18',
	'title'       => 'Coin sums',
	'abbreviated' => false,
	'steps'       => 310409597,
	'time'        => 47970,
	'width'       => 60,
	'height'      => 11,
	'value'       => 73682,
];