Today Neil Sloane of the OEIS sent out an email asking for a confirmation of the current terms, and computation of some larger terms of the latest OEIS sequence A337663 with the keyword "nice". Here's how this sequence works: You label \$n\$ cells on the infinite square grid with \$1\$s, and then place the numbers \$2,3,4,\dots,m\$ in order, subject to the rule that when you place \$k\$, the sum of its [horizontal, vertical, and diagonal] neighbors must equal \$k\$. Then \$A337663(n)\$ is the...
