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 A078782 Nonprimes (A018252) with prime (A000040) subscripts. 14
 4, 6, 9, 12, 18, 21, 26, 28, 34, 42, 45, 52, 57, 60, 65, 74, 81, 84, 91, 95, 98, 106, 112, 119, 128, 133, 135, 141, 143, 147, 165, 170, 177, 180, 192, 195, 203, 209, 214, 220, 228, 231, 244, 246, 250, 253, 267, 284, 288, 290, 295, 301, 303, 316, 323, 329, 336 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = A018252(A000040(n)). Subsequence of A175250 (nonprimes (A018252) with noncomposite (A008578) subscripts), a(n) = A175250(n+1). a(n) U A102615(n) = A018252(n). [From Jaroslav Krizek, Mar 13 2010] LINKS EXAMPLE a(4) = nonprime(prime(4)) = nonprime(7) = 12. CROSSREFS 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. Sequence in context: A310670 A088765 A175250 * A165897 A020165 A110607 Adjacent sequences:  A078779 A078780 A078781 * A078783 A078784 A078785 KEYWORD easy,nonn AUTHOR Joseph L. Pe, Jan 09 2003 EXTENSIONS Corrected by Jaroslav Krizek, Mar 13 2010 STATUS approved

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Last modified April 16 05:26 EDT 2021. Contains 343030 sequences. (Running on oeis4.)