19782

Appears in sequences

• sigma_3(n): sum of cubes of divisors of n.at n=25A001158
• Numbers k such that k and 4*k are anagrams.at n=11A023088
• Sum of cubes of unitary divisors of n.at n=25A034677
• T(n,n-2), array T as in A047100.at n=8A047104
• Dirichlet inverse of sigma_3 function (A001158).at n=25A053825
• a(n) = n^3*Product_{distinct primes p dividing n} (1+1/p^3).at n=25A065959
• Smallest multiple of (n+1)-st prime which is == 1 mod n-th prime.at n=35A073604
• Integer averages of two successive perfect powers (pp(n) + pp(n+1))/2.at n=30A075454
• Distinct-digit averages of two successive perfect powers (pp(n) + pp(n+1))/2.at n=19A075456
• a(n) = A077700(n+1)/A077700(n).at n=20A077701
• a(0)=1, a(n) = sigma_3(2n).at n=13A091986
• a(n) = sigma_3(3n+2).at n=8A092343
• Number of binary sequences of length n containing exactly one subsequence 010.at n=16A118430
• Numbers that are 4-digit palindromes in at least 2 bases.at n=25A180453
• q-expansion of modular form psi_0^4/t_{3B}.at n=26A198956
• Expansion of (E_4(q) - E_4(q^5)) / 240 in powers of q where E_4 is an Eisenstein series.at n=25A226333
• Numbers that are midway between the nearest square and the nearest cube.at n=21A233075
• Sum of n-th powers of divisors of 26.at n=3A241030
• Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.at n=1A254735
• Number of (n+2) X (2+2) 0..1 arrays with every 3 X 3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.at n=1A254737