60787

Appears in sequences

• Numerators of coefficients for central differences M_{4}^(2*n).at n=10A002675
• Numerators of the Taylor coefficients of (e^x-1)^2.at n=21A002678
• Divisors of 2^22 - 1.at n=12A003531
• Divisors of 2^44 - 1.at n=35A003549
• Number of ZnS polytypes that repeat after n layers.at n=22A011957
• Strong pseudoprimes to base 4.at n=22A020230
• Super-Poulet numbers: Poulet numbers whose divisors d all satisfy d|2^d-2.at n=26A050217
• Composite and every divisor (except 1) contains the digit 8.at n=10A062678
• Number of squarefree integers in the closed interval [10^n, -1 + 2*10^n], i.e., among 10^n consecutive integers beginning with 10^n.at n=5A077642
• Sarrus numbers k such that k-1 and k+1 have the same number of prime divisors (counted with multiplicity).at n=4A086806
• a(n)=2*(4^n-1)/denominator(B(2n)) where B(k) denotes the k-th Bernoulli number.at n=11A090648
• a(n) = Jacobsthal(n) * Fibonacci(n).at n=11A093042
• (2^(p-1)-1)/(3*p) where p = prime(n).at n=6A096060
• a(n) = (A097406(n) - 1)/n.at n=45A097407
• Numbers 2*k+1 for which numbers A006694(k) are record values for A006694.at n=35A139208
• Records in A001917.at n=22A152598
• Number of 6-elements orbits of S3 action on irreducible polynomials of degree n > 1 over GF(2).at n=21A165921
• a(n) is the least k such that the period of the decimal expansion of 1/k is A000204(n).at n=14A173491
• Successive maximal values of A174435.at n=26A174437
• Pseudoprimes to base 2 of the form 4k+3.at n=8A177884