A383456 a(n) = 2*binomial(2*n+4,n)*(n+3)/(n+2).

3, 16, 70, 288, 1155, 4576, 18018, 70720, 277134, 1085280, 4249388, 16640960, 65189475, 255487680, 1001800650, 3930284160, 15427730010, 60591880800, 238098549780, 936100651200, 3682173186510, 14490838080576, 57053452670100, 224729967000448, 885568808835900, 3491063797713856, 13767643081368792, 54315062063687040, 214354554086311331

Offset: 0

Author

N. J. A. Sloane, May 02 2025

Keywords

• nonn
• more

Comments

Conjectured to be column 1 of the array in A383453.

Crossrefs

Cf. A383453.