27115

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 7.at n=17A136975
• Partial sums of A000132.at n=30A175360
• Molecular topological indices of the gear graphs.at n=28A192827
• Number of partitions of n with difference -9 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=42A242683
• Number of steps required to reach (2^n)-2 from 2^(n+1)-2 by iterating the map x -> x - (number of runs in binary representation of x).at n=17A255071
• Numbers n such that the decimal digits of n^2 are all prime.at n=17A275971
• Partial sums of A299900.at n=37A299901
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.at n=12A304218
• Terms of A349937 that are not divisible by 3: numbers k > 1 not divisible by 2 or 3 such that A309906(k-1) < A309906(k) > A309906(k+1).at n=13A349941
• Product of the smaller primes, p, in the Goldbach partitions of 2n such that p + q = 2n, p <= q, and p,q prime (or 1 if no Goldbach partition of 2n exists).at n=28A362641
• Radicands of pure cubic number fields of type BETA and subtype M0.at n=28A363699