28225

Appears in sequences

• Numerators of continued fraction convergents to sqrt(501).at n=9A041956
• Numbers k such that k | 6^k + 5^k + 4^k + 3^k + 2^k.at n=31A057256
• a(n) = 6^n(B_n(1/6)-B_n(0)) where B_n(x) is the n-th Bernoulli polynomial.at n=8A083010
• a(n) = 16*n^2 + 1.at n=41A108211
• Numbers of the form (square + 1) that are not squarefree.at n=18A124809
• Numerator of Euler(n, 3/31).at n=3A157530
• a(n) = 36*n^2 + 1.at n=28A158591
• a(n) = 64*n^2 + 1.at n=21A158686
• Numerator of Hermite(n, 1/14).at n=4A159507
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 165", based on the 5-celled von Neumann neighborhood.at n=34A270459
• Löschian numbers (A003136) of the form k^2+1.at n=15A271184
• Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1.at n=30A299708
• Coefficient of x^n in (1 + x + n*x^3)^n.at n=8A307904
• Odd numbers k for which A003961(k)-2k divides A003961(k)-sigma(k), where A003961 shifts the prime factorization one step towards larger primes, and sigma is the sum of divisors function.at n=13A349753
• Numbers that are the sum of a positive square and a positive fifth power in more than one way.at n=16A363715
• Antichain-Boolean Quilt Numbers: Square table of the number of ASM quilts of type B_n x A_2(j) read down antidiagonals, where B_n is the Boolean lattice and A_2(j) is the rank 2 poset with a unique minimal and maximal element and j atoms.at n=12A374821
• Numbers k such that (A003961(k)-2*k) divides (A003961(k)-sigma(k)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.at n=28A378980
• a(n) = Sum_{k=0..floor(n/3)} 2^(n-3*k) * binomial(k,n-3*k)^2.at n=27A387516
• Indices of record high points in A386487.at n=27A387519