310974

Appears in sequences

• Numbers k for which k and k^2 are digitally balanced numbers in base 3 (A049354).at n=18A372147
• Number of compositions of 7*n-5 into parts 6 and 7.at n=19A373937
• a(n) = Sum_{k=0..floor(n/2)} binomial(k,3*(n-2*k)).at n=45A392253