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%I #11 Oct 15 2023 11:58:58
%S 84,1908,74850,806344,19324668,62374858,408913614,891388420,
%T 3398376408,17229339930,27483954208,94862481154,194638347078,
%U 271671521308,506393669424,1174292792658,2487936351660,3141898009018,6059361174964,9093315566088,11045325053158
%N a(n) = p^7 - p^5 - p^3 - p^2 where p is prime(n).
%H Dario Alejandro Alpern, <a href="https://www.alpertron.com.ar/ECM.HTM">Factorization using Elliptic Curve Method</a>.
%e If p=2, 2^7 - 2^5 - 2^3 - 2^2 = 84.
%t Table[p = Prime[n]; p^7 - p^5 - p^3 - p^2, {n, 20}]
%Y Cf. A000040.
%K nonn
%O 1,1
%A _Parthasarathy Nambi_, Oct 20 2004
%E More terms from _Ray Chandler_, Nov 14 2004
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