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%I #5 Apr 06 2016 12:47:52
%S 4,12,21,28,34,42,52,60,65,74,84,95,98,106,119,128,133,135,141,147,
%T 170,177,180,192,195,209,214,220,231,246,250,253,284,288,290,295,301,
%U 316,323,329,336,339,351,365,382,387,390,394,417,429,432,445,462,470,474,481,490,505,516,518,532,538,543,550,559,566
%N The prime/nonprime compound sequence BAB.
%p # For Maple code for the prime/nonprime compound sequences (listed in cross-references) see A003622. - _N. J. A. Sloane_, Mar 30 2016
%Y Let A = primes A000040, B = nonprimes A018252. The 2-level compounds are AA = A006450, AB = A007821, BA = A078782, BB = A102615. The 3-level compounds AAA, AAB, ..., BBB are A038580, A049078, A270792, A102617, A270794, A270796, A102216.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Mar 30 2016
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