72050domain: NAppears in sequencesNumber of binary strings of length n with no substrings equal to 0001 0011 or 1100.at n=17A164459a(n) = Sum_{k=0..n} p(k)^2, where p(k) is the partition function A000041.at n=15A259399Numbers k such that (38*10^k - 119) / 9 is prime.at n=25A278695