47525

Appears in sequences

• a(n) = 10*a(n-1) - a(n-2); a(0) = 1, a(1) = 5.at n=5A001079
• Numerators of continued fraction convergents to sqrt(6).at n=9A041006
• Numerators of continued fraction convergents to sqrt(24).at n=9A041038
• a(n) = 4*prime(n)^2+1.at n=28A060429
• a(n)*a(n+3) - a(n+1)*a(n+2) = 4, given a(0)=a(1)=1, a(2)=5.at n=10A080872
• Number triangle associated to Chebyshev polynomials of first kind.at n=60A101124
• a(n) = a(n-1) + a(n-3) + a(n-4), n >= 4, with initial terms 2,5,4,7.at n=21A111570
• Chebyshev polynomial of the first kind T(n,x), evaluated at x=n.at n=5A115066
• Total number of 5's digits in the first 10^n primes.at n=4A119296
• Triangle read by rows: T(n,k) is number of ternary words of length n and having k runs of 0's of odd length (0 <= k <= ceiling(n/2); a run of 0's is a subsequence of consecutive 0's of maximal length).at n=42A119914
• Number of ternary words of length n and having exactly one run of 0's of odd length.at n=11A119915
• Numbers of the form (square + 1) that are not squarefree.at n=22A124809
• Numerators of continued fraction convergents to sqrt(3/2).at n=9A142238
• Number of n X n binary arrays with all ones connected only in a 1111-1111 pattern in any orientation.at n=8A146933
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1111-1111 pattern in any orientation.at n=18A146935
• Numbers such that floor(a(n)^2 / 6) is a square.at n=16A204518
• a(n) = 16*n^5 - 20*n^3 + 5*n.at n=5A243131
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where A(n,k) is Sum_{j=0..k} binomial(2*k,2*j)*(n+1)^(k-j)*n^j.at n=30A322790
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where A(n,k) is Chebyshev polynomial of the first kind T_{n}(x), evaluated at x=k.at n=60A322836
• Number of irredundant sets in the n-double cone graph.at n=9A391917