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The prime/nonprime compound sequence BBA.
12

%I #5 Apr 06 2016 12:47:52

%S 8,10,15,20,27,32,38,40,49,58,63,72,78,82,88,99,110,114,121,125,129,

%T 140,146,155,166,172,175,183,185,189,212,217,225,230,245,248,258,265,

%U 272,279,289,292,306,309,315,319,334,355,360,362,368,375,377,393,402,408,416,420,427,435,438,452,473,478,482,486,507

%N The prime/nonprime compound sequence BBA.

%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