239085

Appears in sequences

• -arcsinh(log(x+1)-arctanh(x))=1/2!*x^2+6/4!*x^4+105/6!*x^6+3780/8!*x^8...at n=5A013300
• Smallest term in the Hofstadter sequence A005243 having exactly n representations as sum of consecutive earlier terms.at n=23A118166
• Number of n X 2 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.at n=20A278670
• Least positive integer k with exactly n odd divisors greater than sqrt(2*k).at n=30A281008
• a(n) = 1/(Sum_{k=1..n} 1/phi(A341810(n)*k)).at n=46A341811
• a(n) = A000265(A263931(n)).at n=42A356637
• Numbers k such that k and k+1 are both products of 2 triangular numbers.at n=25A356748
• Numbers k with a record number of proper divisors, where all of them have binary weights that are different from the binary weight of k.at n=17A383365