A270792 The prime/nonprime compound sequence ABA.

7, 13, 23, 37, 61, 73, 101, 107, 139, 181, 197, 239, 269, 281, 313, 373, 419, 433, 467, 499, 521, 577, 613, 653, 719, 751, 761, 811, 823, 853, 977, 1013, 1051, 1069, 1163, 1187, 1237, 1289, 1307, 1373, 1439, 1453, 1549, 1559, 1583

Offset

1,1

Links

Table of n, a(n) for n=1..45.

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: A275897 A227786 A339148 * A304671 A075642 A316118

Adjacent sequences: A270789 A270790 A270791 * A270793 A270794 A270795

Keyword

nonn

Author

N. J. A. Sloane, Mar 30 2016

Status

approved