120100

Appears in sequences

• Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,0.at n=6A033117
• Sums of 4 distinct powers of 7.at n=20A038483
• Numbers whose base-7 representation has exactly 7 runs.at n=0A043622
• a(n) = n^6 + n^4 + n^2 + 1.at n=7A059830
• Numbers of the form (7^{mr}-1)/(7^r-1) for positive integers m, r.at n=13A076286
• Modulo 2 binomial transform of 7^n.at n=6A100310
• 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=51A173588
• Jordan function ratio J_8(n)/J_2(n).at n=6A194533
• a(n) = (49^n - 1)/48.at n=4A218753
• 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=32A241855
• Totient numbers (A002202) of the form 1 + k + k^2 + k^3 +...+ k^i (i > 1, k > 1).at n=25A282090