Concatenation of the next \(n\)… to Determinant of matrix with…
- Concatenation of the next \(n\) numbers
- Catalan-Larcombe-French sequence
- Least \(m\) such that \(\phi(m) = n!\)
- Divisibility of \(2^n + 1\) by \(n\)
- Numerator of \(1/\det(M)\) for \(M\[i,j\] = 1/\operatorname{lcm}(i,j)\)
- Number of different products of subsets of \(\{1, 2, \dots, n\}\)
- Reversible multiples \(a(3^n) = 10^{3^{n-2}} - 1\) for powers of \(3\)
- Conjectures associated with A063880
- Numerator - denominator in \(n\)-th harmonic number
- Decimal encoding of the prime factorization of \(n\)
- Conjectures associated with A067720
- Euclid–Fortunate prime coverage
- Sum of \(a(k)/k!\) over divisors equals harmonic number
- Number of times \(n^2 + s^2\) is prime for positive integers \(s < n\)
- Determinant of prime sum indicator matrix
- Number of primes \(p\) such that \(n^n \le p \le n^n + n^2\)
- Number of primes \(p\) such that \(2^n \le p \le 2^n + \mathrm{prime}(n)\)
- Value of \(n\)-th cyclotomic polynomial at \(n\)
- Recurrence \(a(n+2) = |a(n+1)a(n) - a(n)a(n+1)|\) via concatenation
- Determinant of matrix with entries indicating primality of \(i^2 + j^2\)
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