A065605 The (3^n)-th composite number.

4, 8, 16, 40, 111, 306, 882, 2563, 7513, 22170, 65602, 194695, 578949, 1724117, 5140568, 15340177, 45811041, 136886318, 409221920, 1223856725, 3661401440, 10956876415, 32796782398, 98189738332, 294021666926, 880564233896

Offset

0,1

Links

Chai Wah Wu, Table of n, a(n) for n = 0..40

Mathematica

Composite[n_Integer] := Block[ {k = n + PrimePi[n] + 1 }, While[ k != n + PrimePi[k] + 1, k = n + PrimePi[k] + 1]; Return[ k ]]; Table[ Composite[3^n], {n, 0, 25} ]

Crossrefs

Sequence in context: A306621 A144687 A278377 * A065978 A077447 A337783

Adjacent sequences: A065602 A065603 A065604 * A065606 A065607 A065608

Keyword

nonn

Author

Robert G. Wilson v, Nov 27 2001

Status

approved