33165

Appears in sequences

• a(n) is the concatenation of n and 5n.at n=32A019553
• Numbers n such that prime(n) = floor(n*log(n*omega(n))).at n=9A067250
• Numbers n such that prime(n) = floor(n*log(n*omega(sigma(n)))).at n=16A067253
• Triangle of coefficients, read by rows, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (3-sqrt(1-4x))/2 + xy*f(x,y)^3.at n=40A086636
• A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=21A094952
• Composites that are the sum of two, three, four and five consecutive composite numbers.at n=35A151745
• The ED4 array read by antidiagonals.at n=31A167584
• The fifth row of the ED4 array A167584: 80*n^4 + 952*n^2 - 768*n + 525.at n=3A167587
• Expansion of e.g.f. sin( 2 * (exp(x) - 1) )/2.at n=11A357738
• Numbers k with the property that the set of decimal digits of k matches the set of first digits of the prime factors of k.at n=6A359491
• T(n, k) is the total number of symmetric peaks in all partitions of n with exactly k blocks, n >= 3, 2 <= k <= n-1.at n=37A373288
• G.f. A(x) satisfies 1 - x = Sum_{n=-oo..+oo} (x^(2*n) - A(x))^n.at n=14A377249