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A262570
a(n) = A002704(n)/2.
3
1, 13, 469, 21400, 1065229, 55778797, 3020636341, 167544629317, 9461343754981, 541786421337805, 31372013730812824, 1833216802356228733, 107939805322734748117, 6396432908013911687437, 381139174656828902370421, 22819171231066917509661277
OFFSET
0,2
LINKS
Alexander Rosa and Štefan Znám, A combinatorial problem in the theory of congruences (Russian with English summary), Mat.-Fys. Casopis Sloven. Akad. Vied 15 1965 49-59. [Annotated scanned copy.]
Alexander Rosa and Štefan Znám, A remark on a combinatorial problem (Russian with English summary), Mat.-Fyz. Casopis Sloven. Akad. Vied 15 1965 313-316. [Annotated scanned copy] See Table 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 20 2015
EXTENSIONS
More terms from R. J. Mathar, Oct 21 2015
STATUS
approved