A089287 Sum of all prime factors of floor(Pi*10^n), Pi=3.14....

3, 31, 159, 355, 169, 314159, 392705, 10166, 7998, 9787003, 28954814, 157079632681, 68250087, 4349287, 67757089, 1002742628275, 1230791, 1307585156, 14846149, 1296188, 1024025943, 452477425, 1492388104, 381315143079141, 989849547461, 841346597336054869

Offset: 0

Author

Reinhard Zumkeller, Oct 30 2003

Keywords

• nonn

Comments

a(n) = A001414(A011545(n)).

Examples

			n=6: floor(Pi*10^6)=3141592=2*2*2*392699: a(6)=2+2+2+392699=392705.
		

Links

• Tyler Busby, Table of n, a(n) for n = 0..200

Crossrefs

Cf. A089286, A089285, A089283, A000796.

Programs

Mathematica

sapf[n_]:=Total[Flatten[Table[#[[1]],#[[2]]]&/@FactorInteger[n]]]; sapf/@ Floor[Pi 10^Range[0,30]] (* Harvey P. Dale, Nov 18 2018 *)

Extensions

a(23)-a(25) from Tyler Busby, Mar 14 2025