47500

Appears in sequences

• Scaled Chebyshev U-polynomial evaluated at sqrt(5)/2.at n=8A030191
• Square array T(n,k) of second binomial transforms of generalized Fibonacci numbers, read by ascending antidiagonals, with n, k >= 0.at n=64A083861
• Binomial transform of Fibonacci(2n).at n=9A093131
• Alternating sum of the Fibonacci numbers multiplied by their (combinatorial) indices.at n=18A120940
• Matrix square of triangle A136220, read by rows.at n=40A136225
• Triangle, T(n, k) = (sqrt(k+1))^(n-1)*ChebyshevU(n-1, sqrt(k+1)/2), read by rows.at n=49A167925
• Least positive integer k such that both k and k*n belong to the set {m>0: m+1, m^2+1 and m^2+prime(m)^2 are all prime}.at n=2A261339
• a(n) = Sum_{k >= 0}(-1)^k*binomial(n,5*k+1).at n=19A289321
• a(n) = Sum_{k>=0} (-1)^k*binomial(n, 5*k+2).at n=20A289387
• a(n) = 3*n^3 + n^2.at n=25A294315
• a(n) is the index of the first occurrence of n in A331284.at n=30A331285