29125

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 97.at n=20A020436
• Numbers n such that 57*2^n-1 is prime.at n=30A050554
• Expansion of Product_{k > 0} (1 + f(k)*x^k), where f(k) = A147952(A004001(k)).at n=40A147982
• Numbers of form 4^(3*k+l+1)/9 - 4^l/9 - 1/3 or 2*4^(3*k+l+2)/9 - 2*4^l/9 - 1/3, k,l>=0.at n=29A172143
• Greatest odd number that requires n Collatz (3x+1) iterations to reach 1, or zero if there is no such number.at n=20A176868
• Odd numbers producing exactly 3 odd numbers in the Collatz (3x+1) iteration.at n=18A198584
• Odd numbers having no odd primes in their Collatz (3x+1) trajectory.at n=13A221475
• Greatest odd number k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n, or 0 if there is no such k.at n=16A222755
• Odd numbers producing 3 decreasing odd numbers in the Collatz (3x+1) iteration.at n=15A228872
• Odd numbers n containing 16384 as the highest power of 2 in the Collatz (3x+1) iteration.at n=2A247715
• Numbers with more than one Collatz tripling step whose odd Collatz trajectory does not contain primes.at n=31A319936
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. (sec(x) + tan(x))^k.at n=72A322267
• a(n) = (4*n^3 + 12*n^2 - 4*n + 3)/3.at n=27A322594
• Irregular triangle T read by rows: Row n gives the vertex labels of level n of the tree related to the modified reduced Collatz map A324036.at n=76A324038
• Numbers of the form (2^(2*j + 6*k + 10) - 2^(2*j + 2) - 3)/9, with j,k >= 0.at n=6A342816