21296

Appears in sequences

• Numbers of the form 2^i * 11^j.at n=39A003596
• Number of points on surface of truncated tetrahedron: a(n) = 14*n^2 + 2 for n > 0, a(0)=1.at n=39A005905
• G.f.: 2*(1-x^3)/((1-x)^5*(1+x)^2).at n=42A005996
• Denominator of sum of -3rd powers of divisors of n.at n=43A017670
• Discriminants of totally complex sextic fields (negated).at n=14A023687
• a(n) = 2*n^3.at n=22A033431
• Numbers whose prime factors are 2 and 11.at n=20A033848
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*11^j.at n=13A038241
• Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*4^j.at n=11A038318
• Numbers k such that 8*10^k-1 is prime.at n=18A056721
• Numbers which are the sum of two positive cubes and divisible by 11.at n=27A101852
• a(n) is the least k such that k and k+n are adjacent powerful numbers.at n=19A103954
• Numbers of the form (4^i)*(11^j), with i, j >= 0.at n=21A107988
• Cubic polynomial coefficients such that an elliptical term is zero.at n=43A114798
• n*phi(n)*phi(phi(n)) is a square.at n=36A116002
• a(n) = n*floor(n/2)^2.at n=44A122656
• a(n) = the definite integral Integral_{0..1} Product_{j=1..n} 4*sin^2(Pi*j*x) dx.at n=26A133871
• Expansion of g.f. (1 +x^2)/((1-x)^2*(1 -3*x +2*x^2 -x^3)).at n=10A136303
• Number of binary strings of length n with no substrings equal to 0000 0001 or 0101.at n=14A164410
• Totally multiplicative sequence with a(p) = 5p+1 for prime p.at n=23A166663