171232

Appears in sequences

• a(1) = 2; for n>1, a(n) = largest integer such that the sequence b(n) = a(n)^(1/n) is decreasing.at n=23A207976
• Number of 5 X n 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.at n=15A223952
• Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 2 + 3*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2*x - x^2.at n=51A367297