159220

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 42.at n=18A031720
• a(n) is the absolute value of floor(x^n), where x = e/(2-e) = -3.784422... is derived from e=A001113.at n=8A088655
• a(n) = 361*n^2 + 19.at n=21A158592
• Number of increasing sequences of n integers x(1),...,x(n) with values in 1..5*n such that x(j) divides x(k) iff j divides k.at n=30A180382
• Number of length-4 0..n arrays with no repeated value equal to the previous repeated value.at n=18A269468
• a(n) is the number of 2-point antichains in the poset D_{2n+1} of type D, whose elements are compositions of 2n+1.at n=37A344791