A382675 a(n) = 4 - 15 * 2^n + 12 * 3^n.

1, 10, 52, 208, 736, 2440, 7792, 24328, 74896, 228520, 693232, 2095048, 6315856, 19009000, 57149872, 171695368, 515577616, 1547715880, 4645113712, 13939273288, 41825684176, 125492781160, 376509800752, 1129592316808, 3388902779536, 10166959996840

Offset: 0

Author

Seiichi Manyama, Apr 03 2025

Keywords

• nonn
• easy

Crossrefs

Column k=2 of A382673.

Row n=2 of A382673.

Programs

PARI

a(n) = 4-15*2^n+12*3^n;