406901

Appears in sequences

• Base-5 digits are, in order, the first n terms of the periodic sequence with initial period 1,0.at n=8A033115
• Numbers whose base-5 representation has exactly 9 runs.at n=0A043609
• a(n) = n^4 + n^3 + n^2 + n + 1.at n=25A053699
• a(n) = n^8 + n^6 + n^4 + n^2 + 1.at n=5A059839
• Sum of squares of divisors of square numbers.at n=24A065827
• Numbers of the form (5^{mr}-1)/(5^r-1) for positive integers m, r.at n=19A076284
• Triangle T(n, k, q) = q-binomial(n, k, q^2), for q = 5, read by rows.at n=16A173583
• Triangle T(n, k, q) = q-binomial(n, k, q^2), for q = 5, read by rows.at n=19A173583
• 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=40A173588
• a(n) = (25^n - 1)/24.at n=5A218728
• 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=33A241855
• a(n) = (n^(2n)-1)/(n^2-1) for n > 1, a(1) = 1.at n=4A343009