This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A352663 #16 Mar 29 2022 05:47:18 %S A352663 0,0,0,0,0,0,0,0,0,0,5,18,231,642,4040,25320,166201,1115373,8060958, %T A352663 61981118,497224414 %N A352663 Number of asymmetric characteristic solutions to the n-superqueens problem. %D A352663 D. E. Knuth, The Art of Computer Programming, Section 7.2.2.3 (draft, March 2022). %e A352663 One of the a(11)=5 solutions is %e A352663 +-----------------------+ %e A352663 | A . . . . . . . . . . | %e A352663 | . . . . A . . . . . . | %e A352663 | . . . . . . . . A . . | %e A352663 | . A . . . . . . . . . | %e A352663 | . . . . . A . . . . . | %e A352663 | . . . . . . . . . A . | %e A352663 | . . A . . . . . . . . | %e A352663 | . . . . . . A . . . . | %e A352663 | . . . . . . . . . . A | %e A352663 | . . . A . . . . . . . | %e A352663 | . . . . . . . A . . . | %e A352663 +-----------------------+ %e A352663 and the other four are obtained by wraparound shifts. %Y A352663 Cf. A051223, A051224, A352661, A352662. %K A352663 nonn,more %O A352663 1,11 %A A352663 _Don Knuth_, Mar 25 2022