Packing doesn’t necessarily make nice symmetrical things. I don’t have an image for n=51 but this [1] is for 55. Interestingly for square numbers from 49 on, th

Packing doesn’t necessarily make nice symmetrical things. I don’t have an image for n=51 but this [1] is for 55. Interestingly for square numbers from 49 on, the best packing is not the obvious square lattice either [2] [1]: https://www.ime.usp.br/~egbirgin/packing/packing_by_nlp/numerical.php?table=csq-mina&title=Packing%20of%20unitary-radius%20circles%20in%20a%20square https://www.ime.usp.br/~egbirgin/packing/packing_by_nlp/nume... [2]: https://www.ime.usp.br/~egbirgin/packing/packing_by_nlp/numerical.php?table=csq-mina&title=Packing%20of%20unitary-radius%20circles%20in%20a%20square https://www.ime.usp.br/~egbirgin/packing/packing_by_nlp/nume...