40071

Appears in sequences

• Smallest positive integer m such that m = pi(n*m) = A000720(n*m).at n=10A038626
• Values of transition of A072608(n) from alternating behavior (0,1,0,1,..) into steadily-1 (1,1,1,..) behavior or changing back. Expressing in terms of A072609(n): at n values it switches from steadily 0 into steadily 1 successive values or back.at n=16A072610
• a(n) = sigma_6(n^2)/sigma_3(n^2).at n=5A084220
• Numbers k such that prime(k+1) == 1 (mod k).at n=14A105286
• Sequence related to the Hankel transform of A105523(n+5).at n=35A181474
• Number of orbits of Aut(Z^7) as function of the infinity norm n of the representative lattice point of the orbit, when the cardinality of the orbit is equal to 26880.at n=38A266397
• Numbers n such that there are precisely 15 groups of orders n and n + 1.at n=19A295995
• Numbers k such that k = PrimePi(k * digsum(k)).at n=2A353126