325080
domain: N
Appears in sequences
- a(n) = ADP(n) is the total number of aperiodic k-double-palindromes of n, where 2 <= k <= n.at n=27A181135
- Numbers with prime factorization pqrs^3t^3.at n=21A190385
- n-th derivative of cos(x)^tan(x) at x=0.at n=10A215586
- n-th derivative of cosh(x)^tanh(x) at x=0.at n=10A215588
- n-th derivative of sec(x)^tan(x) at x=0.at n=10A215680
- n-th derivative of sech(x)^tanh(x) at x=0.at n=10A215683
- Numbers k such that k^7 - 1 and k^7 + 1 are semiprimes.at n=18A279272
- a(n) is the least x such that x-1 and x+1 are prime and there are exactly n primes of the form x-1+t or x+1+t where t divides x.at n=42A340170
- Positions of records in A355593: Integers whose number of alternating divisors sets a new record.at n=31A355595