198967

Properties

Appears in sequences

• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 23 (most significant digit on right).at n=9A061976
• Primes p for which p^i + 4 is prime for i = 1, 3 and 5.at n=21A243780
• E.g.f. A(x) satisfies A(x) = exp( x/A(-x*A(x)^4) ).at n=6A384803
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f. B(x)^k, where B(x) is the e.g.f. of A384803.at n=34A384804
• Prime numbersat n=17904