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A270795 The prime/nonprime compound sequence BAB. 3
4, 12, 21, 28, 34, 42, 52, 60, 65, 74, 84, 95, 98, 106, 119, 128, 133, 135, 141, 147, 170, 177, 180, 192, 195, 209, 214, 220, 231, 246, 250, 253, 284, 288, 290, 295, 301, 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

MAPLE

# For Maple code for the prime/nonprime compound sequences (listed in cross-references) see A003622.  - N. J. A. Sloane, Mar 30 2016

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: A087080 A134253 A115106 * A191260 A047965 A329472

Adjacent sequences:  A270792 A270793 A270794 * A270796 A270797 A270798

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 30 2016

STATUS

approved

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Last modified November 21 00:06 EST 2019. Contains 329348 sequences. (Running on oeis4.)