A094338 (Sum of composites among next n numbers)-(sum of primes among next n numbers).
0, -5, 5, 20, 17, 39, 129, 140, 127, 305, 431, 448, 603, 777, 1037, 1540, 1313, 1951, 2373, 2450, 2861, 3407, 3975, 4656, 5329, 6073, 6951, 7092, 7983, 8091, 11063, 11290, 14695, 12749, 14143, 14276, 18495, 20201, 20571, 25612, 21065, 28283
Offset: 1
Keywords
Examples
a(4) = (8+9+10)-(7) =20.
Links
- Harvey P. Dale, Table of n, a(n) for n = 1..1000
Crossrefs
Cf. A094337.
Programs
-
Mathematica
scsp[n_]:=Module[{prs=Select[n,PrimeQ]},Total[Complement[n,prs]]-Total[ prs]]; With[{nn=50},scsp/@TakeList[Range[(nn(nn+1))/2],Range[nn]]]/. (1->0) (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 01 2019 *)
Extensions
More terms from Sean A. Irvine, Oct 13 2009