61509375

Appears in sequences

• Denominators of partial alternating sums of Catalan numbers scaled by powers of 1/(5*3^2) = 1/45.at n=5A121009
• Denominators in infinite products for Pi/2, e and e^gamma (reduced).at n=5A122215
• Numbers n such that Sum_{i=1..j} 1/pn(i) + Sum_{i=1..k} 1/pd(i) is an integer, where pn are the prime factors of n and pd the prime factors of the arithmetic derivative of n, both counted with multiplicity.at n=19A239490
• Numbers n such that Sum_{i=1..j} 1/pn(i) - Sum_{i=1..k} 1/pd(i) is an integer, where pn are the prime factors of n and pd the prime factors of the arithmetic derivative of n, both counted with multiplicity.at n=13A239491
• Sequence related to the asymptotic expansion of Sum_{k=1..n} tau(m*k).at n=14A372793