52077

Appears in sequences

• Number of primitive (no repeated characters) and irreducible (not the concatenation of generatable strings) strings obtained from abc by iterated repetition of substrings in place.at n=51A135157
• a(n) = ((5+sqrt(2))*(1+sqrt(2))^n + (5-sqrt(2))*(1-sqrt(2))^n)/2.at n=11A162268
• Number of partitions of (5, n) into a sum of distinct pairs.at n=25A268348
• Numbers k such that k^2 + 23 is twice a square.at n=11A387549