78124

Appears in sequences

• a(n) = 5^n - 1.at n=7A024049
• Numbers that are repdigits in base 5.at n=28A048330
• Jordan function J_7(n).at n=4A069092
• a(n) = 4*a(n-1) + 5*a(n-2) for n > 1, with a(0) = 2 and a(1) = 4.at n=7A087404
• a(n) = 0^n + 5^n - 1.at n=7A103455
• a(n) = number of distinct prime divisors (taken together) of numbers of the form 4x^2+1 for x<=10^n.at n=4A144852
• Difference of two positive 7th powers.at n=10A181126
• Numbers of the form i*5^j-1 (i=1..4, j >= 0).at n=28A181287
• Monotonic ordering of nonnegative differences 5^i-3^j, for 40>=i>=0, j>=0.at n=44A192150
• Monotonic ordering of nonnegative differences 5^i-4^j, for 40>= i>=0, j>=0.at n=36A192162
• Monotonic ordering of nonnegative differences 5^i-6^j, for 40>= i>=0, j>=0.at n=28A192193
• Monotonic ordering of nonnegative differences 5^i-7^j, for 40>= i>=0, j>=0.at n=26A192195
• Monotonic ordering of nonnegative differences 5^i-8^j, for 40>= i>=0, j>=0.at n=25A192197
• Monotonic ordering of nonnegative differences 5^i-9^j, for 40>= i>=0, j>=0.at n=24A192199
• Monotonic ordering of nonnegative differences 5^i-10^j, for 40>= i>=0, j>=0.at n=23A192201
• a(n) = n^7 - 1.at n=4A258808
• Sheffer triangle S2[4,1] = (exp(x), exp(4*x) - 1).at n=29A285061
• Triangle read by rows: T(n, m) = A285061(n, m)*m!, 0 <= m <= n.at n=29A285066
• Square array read by antidiagonals upwards: T(n,k) is the number of right unique relations between set A with n elements and set B with k elements.at n=48A329940
• The "Fouriest" numbers: numbers that can be expressed as a string of 4's longer than the original number in some base.at n=5A349031