A347302 a(n) = 3^n - lcm{1..n}, with a(0) = 0.

0, 2, 7, 21, 69, 183, 669, 1767, 5721, 17163, 56529, 149427, 503721, 1233963, 4422609, 13988547, 42326001, 116887923, 375168249, 929468907, 3253991841, 10227560643, 31148267049, 88788949947, 277075307601, 820517465043, 2515094683929, 7545284051787, 22796479021761

Offset: 0

Author

N. J. A. Sloane, Aug 28 2021

Keywords

• nonn

Comments

a(n) >= 0 [Hanson, Th. 1]

References

• Hanson, Denis. "On the product of the primes." Canadian Mathematical Bulletin 15.1 (1972): 33-37.
• Tenenbaum, G. (2015). Introduction to analytic and probabilistic number theory, 3rd ed., American Mathematical Soc. See page 14.

Links

• Harvey P. Dale, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A003418, A347303.

Programs

Mathematica

Join[{0},Table[3^n-LCM@@Range[n],{n,30}]] (* Harvey P. Dale, Aug 13 2024 *)