21215

Appears in sequences

• Multiplicity of highest weight (or singular) vectors associated with character chi_57 of Monster module.at n=39A034445
• Number of consecutive runs of 3 odd nonprimes congruent to 1 mod 4 below 10^n.at n=6A093187
• Sums of squared coefficients in the negative powers of the Catalan function: a(n) = Sum_{k=1..n+1} [x^(n-k+1)] 1/C(x^2)^k, where C(x) is the g.f. of A000108.at n=14A132459
• Number of strings of numbers x(i=1..n) in 0..2 with sum i^2*x(i)^3 equal to n^2*8.at n=17A184311
• Numbers n such that 36n+11, 36(n+1)+11, 36(n+2)+11 and 36(n+3)+11 are prime.at n=22A255608