61741

Appears in sequences

• a(n) = 5^n - 4^n.at n=7A005060
• Nexus numbers (n + 1)^7 - n^7.at n=4A022523
• 4-Stirling numbers of the second kind.at n=29A143496
• Difference of two positive 7th powers.at n=7A181126
• Expansion of d/dx log(1/(1-x/sqrt(1-4*x^2))).at n=13A189053
• Monotonic ordering of nonnegative differences 5^i-4^j, for 40>= i>=0, j>=0.at n=29A192162
• Triangular array read by rows, T(n,k) is the number of functions from {1,2,...,n} into {1,2,...,n} with maximum value of k.at n=25A199656
• Indices of Ulam prime triples, where u(k), u(k+1) and u(k+2) are all primes, and u(k) = A002858(k) are the Ulam numbers.at n=25A307330
• a(n) = a(n-1) + 20*a(n-2), n >= 2; a(0)=1, a(1)=41.at n=6A320468
• Numbers of squares formed by this procedure on n-th step: Step 1, draw a unit square. Step n, draw a unit square with center in every intersection of lines of the figure in step n-1.at n=28A336288
• Least k such that A359247(k) = n, or 0 if no such k exists.at n=35A359657
• Numbers which are the sum or difference of two seventh powers.at n=21A364654
• Triangle read by rows: T(n,k) = Sum_{j=0..k} (-1)^(k-j) * binomial(k,j) * (4+j)^n.at n=29A391633