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

0,2

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

Table of n, a(n) for n=0..28.

Crossrefs

Cf. A003418, A347303.

Sequence in context: A274203 A330058 A220726 * A127540 A339041 A319852

Adjacent sequences: A347299 A347300 A347301 * A347303 A347304 A347305

Keyword

nonn

Author

N. J. A. Sloane, Aug 28 2021

Status

approved