42131

Properties

Appears in sequences

• Third column of A027446.at n=8A027458
• Triangle of numerators in the square of the matrix A[i,j] = 1/i for j <= i, 0 otherwise.at n=57A119947
• Numerators of third-order harmonic numbers (defined by Conway and Guy, 1996).at n=8A124837
• Primes in A124837.at n=2A124880
• Triangle, read by rows, where the g.f. of column k, C_k(x), is defined by the recurrence: C_k(x) = [ 1 + Sum_{n>=k+1} C_n(x)*x^(n-k) ]^(k+1) for k>=0.at n=29A127126
• Column 1 of triangle A127126.at n=6A127128
• Number of closed lambda-terms of size n with at most 1 free de Bruijn index.at n=6A220895
• Primes p congruent to 11 mod 12 such that (p - 1)/2 does not divide the numerator of the Bernoulli number B(p-1).at n=29A232040
• Primes p such that the sum of the squares of digits of p equals the sum of digits of p^2.at n=19A290972
• Numbers whose digits are in nondecreasing order in bases 7 and 8.at n=36A329297
• Primes p such that, if q is the next prime, p^2 + q is a prime times a power of 10.at n=36A352852
• Prime numbersat n=4404