28171

Appears in sequences

• a(n+1) = a(n)-th composite and a(1) = 13.at n=39A059408
• a(n) = (n+1)*(n+2)*(n+3)*(n+4)*(5*n^2 + 19*n + 15)/360.at n=9A107963
• Consider the array T(n, m) where the n-th row is the sequence of integer coefficients of A(x), where 1<=a(n)<=n, such that A(x)^(1/n) consists entirely of integer coefficients and where m is the (m+1)-th coefficient. This is the row sum of A to the first coefficient of one.at n=25A112285
• Number of 3 X n 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.at n=33A223950
• Numbers m with C(2*m, m) - prime(m) prime, where C(2*m, m) = (2*m)!/(m!)^2.at n=35A236248
• Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.at n=15A256354
• Expansion of Product_{k>=0} 1/(1-x^(4*k+1))^3.at n=33A261632
• Positions of squares in A259934.at n=6A263276
• Indices n of j-points j(n) for successive positive minima of the Riemann zeta function on critical line.at n=6A329751
• a(n) = Sum_{k=1..n} binomial(n,k) * sigma(k) * sigma(n - k + 1), where sigma = A000203.at n=8A330088
• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = exp(Sum_{n>0} u*sigma(n)*x^n/n!).at n=46A338871