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PHP, 57 bytes <?php $x=0;$y=1;while(1){echo(string)($x+=$y)." ";$y+=2;} Try it online! PHP's a nice language, I tell ya.
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#1: Initial revision
# [PHP], 57 bytes <!-- language-all: lang-php --> <?php $x=0;$y=1;while(1){echo(string)($x+=$y)." ";$y+=2;} [Try it online!][TIO-ktf19jn6] PHP's a nice language, I tell ya. [PHP]: https://php.net/ [TIO-ktf19jn6]: https://tio.run/##K8go@P/fxr4go0BBpcLWwFql0tbQujwjMydVw1CzOjU5I1@juKQoMy9dU0OlQttWpVJTT0lBCahM29bIuvb/f4/UnJx8AA "PHP – Try It Online"