23784

Appears in sequences

• a(n) is the sum over all floor(k^3/n), k=0 to n inclusive.at n=44A014818
• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in two by two blocks.at n=9A145860
• Number of n X n binary arrays symmetric about the diagonal and under 90-degree rotation with all ones connected only in two by two blocks.at n=20A145862
• a(n) = 1728*n - 408.at n=13A157266
• Numbers n whose cubes are concatenations n^3 = x//y such that x is an anagram of y.at n=7A162946
• Number of right triangles on a (n+1)X7 grid.at n=17A189811
• Numbers k such that 5 is the smallest decimal digit of k^2.at n=32A291630
• Trajectory of 270 under repeated application of k -> (phi(k)+sigma(k))/2.at n=17A291789
• Numbers k such that k^2+1, (k+2)^2+1 and (k+6)^2+1 are prime.at n=36A302021
• G.f. = Phi^6, where Phi = g.f. for A028930.at n=14A328531
• Records of A038804: (Smallest prime > 10^n) - (largest prime < 10^n).at n=25A331834
• a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n,3*k+1) * a(k).at n=15A352879
• Order 3 perimeter magic squares of magic sum n, all elements distinct and 1 in the set; bracelet symmetry.at n=43A382455