n   number of symmetric 0-1-matrices with each row- and columnsum >= n/2
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 1                                                      1
 2                                                      5
 3                                                     14
 4                                                    315
 5                                                   2634
 6                                                 301262
 7                                                8035168
 8                                             4451407563
 9                                           392447922178
10                                       1028823851939030
11                                     306635655405986312
12                                 3743721825782942609558
13                              3832881704712490758507152
14                         215313862348697780762374273824
15                      766493362781127793638943080523776
16                196222469681558506008588371784165178651