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%I #14 Aug 28 2021 11:38:22
%S 0,2,7,21,69,183,669,1767,5721,17163,56529,149427,503721,1233963,
%T 4422609,13988547,42326001,116887923,375168249,929468907,3253991841,
%U 10227560643,31148267049,88788949947,277075307601,820517465043,2515094683929,7545284051787,22796479021761
%N a(n) = 3^n - lcm{1..n}, with a(0) = 0.
%C a(n) >= 0 [Hanson, Th. 1]
%D Hanson, Denis. "On the product of the primes." Canadian Mathematical Bulletin 15.1 (1972): 33-37.
%D Tenenbaum, G. (2015). Introduction to analytic and probabilistic number theory, 3rd ed., American Mathematical Soc. See page 14.
%Y Cf. A003418, A347303.
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Aug 28 2021
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