38021

Appears in sequences

• a(n) = (6*n+1)*(6*n+5).at n=32A001513
• Integer part of n#/(p-5)#, where p=preceding prime to n.at n=42A102791
• Product of the n-th cousin prime pair.at n=13A143206
• a(n) = 100*n^2 + 100*n + 21.at n=19A152161
• Numbers k such that exactly one d, 2 <= d <= k/2, exists which divides binomial(k-d-1, d-1) and is not coprime to k.at n=22A178071
• a(n) = prime(n)^2 - 4*prime(n).at n=42A245034
• Numbers that are both a sum and a product of two or more consecutive primes.at n=25A254859
• Quasi-Carmichael numbers to exactly three bases.at n=13A257753
• Semiprimes whose prime factors are of equal binary length and which differ from each other in one bit position only.at n=29A261073
• Semiprimes p*q for which p and q are successive primes and their binary representations differ from each other in one bit position only.at n=13A261080
• Number of bipartitions of n wherein odd parts are distinct (and even parts are unrestricted).at n=28A273225
• Coefficients in the expansion Product_{ n>=1 } (1-q^(2n-1))^2/(1-q^(2n))^2.at n=28A274621
• Sequence of pairwise relatively prime numbers of class P_3 (see comment).at n=22A275246
• G.f.: Sum_{k>=1} x^(2*k-1)/(1+x^(2*k-1)) * Product_{k>=1} 1/(1-x^k).at n=37A305123
• Nonprime squarefree numbers whose prime indices all have the same Omega (A001222) and the same sum of prime indices (A056239).at n=21A327908
• Positions of records in A329040.at n=31A329051