78750

Appears in sequences

• Theta series of A_6 lattice.at n=38A008446
• Triangle of coefficients in expansion of (1+5x)^n.at n=49A013612
• Triangle whose (i,j)-th entry is 5^(i-j)*binomial(i,j).at n=50A038243
• Sums of two distinct powers of 5.at n=25A038474
• 5-idempotent numbers.at n=4A050982
• Sums of two powers of 5.at n=32A055237
• Numbers k that can be expressed as k = w+x = y*z with w*x = (y+z)^3 where w, x, y, and z are all positive integers.at n=30A057370
• Consider the solutions to k = a+b = x*y and a*b = k*(x+y) where k, a, b, x, and y are all positive integers, ordered by increasing k and, in case of ties, by increasing x. Sequence gives values of a*b.at n=16A057421
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 1.at n=50A059297
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 2.at n=40A059298
• Triangle of idempotent numbers (version 3), T(n, k) = binomial(n, k) * (n - k)^k.at n=49A059299
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 4.at n=40A059300
• Digital sum of n = sum of palindromes from the smallest prime factor of n to the largest prime factor of n.at n=25A074310
• Coefficient triangle for polynomials used for e.g.f.s for unsigned Stirling1 diagonals.at n=25A112486
• Fifth column of triangle A112486 used for e.g.f.s of |Stirling1|=|A008275| diagonals.at n=2A112490
• Partition number array, called M31(5), related to A049353(n,m)= |S1(5;n,m)| (generalized Stirling triangle).at n=36A144355
• Numbers n with property that n+41, n^2+41 and n^3+41 are all primes.at n=28A175260
• a(n) = Product_{i=2..n} (tau(i)+1)/(tau(i)-1), where tau(.)=A000005(.).at n=15A181574
• Numbers k such that the sum of prime factors of k (counted with multiplicity) equals five times the largest prime divisor of k.at n=33A212863
• Number T(n,k) of endofunctions on [n] whose cycle lengths are multiples of k; triangle T(n,k), n >= 0, 0 <= k <= n, read by rows.at n=31A246609