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%I #14 Sep 19 2020 23:55:06
%S 47867742232066880047611079,66530901767250778519910138569,
%T 133013935792269490159772666059,199496969817288201799635193549,
%U 265980003842306913439497721039,332463037867325625079360248529,398946071892344336719222776019,465429105917363048359085303509
%N Numbers congruent to 47867742232066880047611079 modulo 66483034025018711639862527490.
%C The terms of this sequence cannot be written as +-p^a +-q^b with p, q prime and a, b nonnegative integers for any possible choice of signs (cf. Theorem in Sun, 2000).
%C 47867742232066880047611079 is a Brier number (A076335). - _Jeppe Stig Nielsen_, Sep 16 2020
%H Fred Cohen and J. L. Selfridge, <a href="https://doi.org/10.1090/S0025-5718-1975-0376583-0">Not every number is the sum or difference of two prime powers</a>, Math. Comp. 29 (1975), 79-81.
%H Zhi-Wei Sun, <a href="https://doi.org/10.1090/S0002-9939-99-05502-1">On integers not of the form +-p^a+-q^b</a>, Proceedings of the American Mathematical Society, Vol. 128, No. 4 (2000), 997-1002.
%F a(n) = 66483034025018711639862527490*n + 47867742232066880047611079.
%t Table[66483034025018711639862527490 n + 47867742232066880047611079, {n, 0, 7}] (* _Michael De Vlieger_, Feb 02 2017 *)
%o (PARI) a(n) = 66483034025018711639862527490*n+47867742232066880047611079
%Y Cf. A153352.
%K nonn,easy
%O 1,1
%A _Felix Fröhlich_, Feb 01 2017
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