28153

Appears in sequences

• Pseudoprimes to base 39.at n=39A020167
• Strong pseudoprimes to base 18.at n=17A020244
• Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 4 (mod 5).at n=50A035565
• For n > 1, a(n) is the smallest number such that n-th concatenation is prime and the smallest palindrome beginning with (but not equal to) this concatenation is also prime.at n=23A088090
• a(n)*a(n-9) = a(n-1)*a(n-8)+a(n-4)+a(n-5) with initial terms a(1)=...=a(9)=1.at n=27A133847
• Integers k such that A166100(k)/A005408(k) is not an integer.at n=37A166101
• Number of 4's in the last section of the set of partitions of n.at n=48A182714
• Number of nonnegative integer arrays of length 2n+5 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1.at n=20A211850
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=29A218172
• Number of length n+4 0..3 arrays with no consecutive five elements summing to more than 2*3.at n=4A241931
• T(n,k)=Number of length n+4 0..k arrays with no consecutive five elements summing to more than 2*k.at n=25A241936
• Number of length 5+4 0..n arrays with no consecutive five elements summing to more than 2*n.at n=2A241941