Question

How to calculate the series 1 3 4 8 15 27 50 92 169 311 572 ... N in PHP

Answer 1

$a = 1;
$b = 3;
$c = 4;
    
$total = 11;
        
echo $a . " " . $b . " " . $c . " ";
    
$sum = 0;
    
for ($i = 4; $i <= $total; $i++) {
    $sum = $a + $b + $c;
    echo $sum . " ";
        
    $a = $b;
    $b = $c;
    $c = $sum;
}




/*
run:
   
1 3 4 8 15 27 50 92 169 311 572 
 
*/

 

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