A276374 Numbers n such that A240024(n) = A002808(n).

5, 6, 8, 13, 14, 24, 26, 31, 32, 34, 51, 54, 57, 62, 69, 82, 83, 93, 99, 113, 114, 119, 125, 132, 133, 139, 143, 145, 151, 161, 165, 181, 182, 192, 195, 212, 217, 219, 224, 233, 266, 282, 293, 295, 304, 311, 312, 318, 325, 338, 354, 364, 369, 375, 376, 382

Offset: 1

Author

Peter Kagey, Aug 31 2016

Keywords

• nonn

Links

• Peter Kagey, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002808, A240024, A276375.

Programs

Haskell

a276374 n = a276374_list !! (n - 1)
a276374_list = filter (\i -> a240024 i == a002808 i) [1..]

Mathematica

c = Select[Range@ 500, CompositeQ]; a = {1, 4}; Do[k = 6; While[Or[PrimeQ@ k, MemberQ[a, k], CoprimeQ[a[[i - 1]], k]], k++]; AppendTo[a, k], {i, 3, Length@ c}]; Flatten@ Position[Union /@ Transpose@ {a, c}, w_ /; Length@ w == 1] (* Michael De Vlieger, Sep 01 2016 *)