A152082 Largest prime divisors of the terms of A152080.

11, 11, 29, 13, 23, 13, 11, 19, 37, 29, 71, 23, 23, 109, 47, 41, 5, 83, 17, 157, 19, 53, 37, 29, 167, 11, 53, 5, 13, 19, 5, 229, 103, 151, 263, 73, 23, 163, 43, 17, 167, 29, 19, 41, 83, 17, 191, 139, 89, 109, 149, 37, 43, 73, 53, 59, 5, 379, 383, 89, 233, 167

Offset

1,1

Links

Table of n, a(n) for n=1..62.

Mathematica

f[n_] := FromDigits[IntegerDigits[n, 2], 4]; pmax[n_] := FactorInteger[n][[-1, 1]]; pmax /@ Select[Range[1300], CompositeQ[#] && PrimeQ[f[#]] &] (* Amiram Eldar, Aug 31 2019 *)

Crossrefs

Cf. A000695, A152021, A152022, A152023, A152078, A152080.

Sequence in context: A022345 A246554 A218163 * A070849 A124297 A172507

Adjacent sequences: A152079 A152080 A152081 * A152083 A152084 A152085

Keyword

nonn

Author

Vladimir Shevelev, Nov 23 2008

Extensions

More terms from Amiram Eldar, Aug 31 2019

Status

approved