10172526

Appears in sequences

• Base-5 digits are, in order, the first n terms of the periodic sequence with initial period 1,0.at n=10A033115
• a(n) = 111111 in base n.at n=24A053700
• Numbers of the form (5^{mr}-1)/(5^r-1) for positive integers m, r.at n=26A076284
• Triangle T(n, k, q) = q-binomial(n, k, q^2), for q = 5, read by rows.at n=22A173583
• Triangle T(n, k, q) = q-binomial(n, k, q^2), for q = 5, read by rows.at n=26A173583
• T(n,k) = (k^n)*U(n, (1/k + k)/2), where U(n,x) is the n-th Chebyshev polynomial of the second kind, square array read by antidiagonals upward (n >= 0, k >= 1).at n=49A173588
• Determinant of the symmetric n X n matrix M_n where M_n(j,k) = n^2+1 for j = k, M_n(j,k) = n for abs(j-k) = 1, M_n(j,k) = 0 otherwise.at n=4A174964
• a(n) = (25^n - 1)/24.at n=6A218728
• Array t(n,k) of sum of successive even powers of primes, where t(n,k) = sum_(j=0..k-1) prime(n)^(2j), with n>=1 and k>=0, read by ascending antidiagonals.at n=42A241855