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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.

A071984 Square loops: the number of circular permutations (reversals not counted as different) of the numbers 1 to n such that the sum of any two consecutive numbers is a square.

Table of values

n a(n)
32 1
33 1
34 11
35 57
36 31
37 20
38 25
39 50
40 64
41 464
42 1062
43 4337
44 10091
45 21931
46 69623
47 115913
48 227893
49 457707
50 297126
51 1051583
52 3377189
53 7618873
54 12476654
55 25832098
56 55792448
57 75126741
58 129180538
59 357114149
60 823402071
61 3902161448
62 20043267339
63 131420398568
64 347422743997
65 811591067418

List of values

[1, 1, 11, 57, 31, 20, 25, 50, 64, 464, 1062, 4337, 10091, 21931, 69623, 115913, 227893, 457707, 297126, 1051583, 3377189, 7618873, 12476654, 25832098, 55792448, 75126741, 129180538, 357114149, 823402071, 3902161448, 20043267339, 131420398568, 347422743997, 811591067418]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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