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A262570 a(n) = A002704(n)/2. 3

%I

%S 1,13,469,21400,1065229,55778797,3020636341,167544629317,

%T 9461343754981,541786421337805,31372013730812824,1833216802356228733,

%U 107939805322734748117,6396432908013911687437,381139174656828902370421,22819171231066917509661277

%N a(n) = A002704(n)/2.

%H Rosa, Alexander; Znam, Stefan, <a href="/A002703/a002703.pdf">A combinatorial problem in the theory of congruences (Russian with English summary)</a>, Mat.-Fys. Casopis Sloven. Akad. Vied 15 1965 49-59. [Annotated scanned copy.]

%H Rosa, Alexander; Znam, Stefan, <a href="/A002703/a002703_1.pdf">A remark on a combinatorial problem (Russian with English summary)</a>, Mat.-Fyz. Casopis Sloven. Akad. Vied 15 1965 313-316. [Annotated scanned copy] See Table 3.

%Y Cf. A002704, A262583, A262584.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Oct 20 2015

%E More terms from _R. J. Mathar_, Oct 21 2015

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Last modified August 18 04:47 EDT 2022. Contains 356204 sequences. (Running on oeis4.)