A156618 Denominators of Egyptian fraction for Pi-3 whose partial sums are the convergents.

7, -742, 11978, -3740526, 1099482930, -2202719155, 6600663644, -26413901692, 96840976853, -496325469560, 2346251883960, -44006595799206, 1345586183756654, -4127747481719463, 10251870941174304

Offset: 0

Author

Jaume Oliver Lafont, Feb 11 2009

Keywords

• sign

Comments

Numerators are all 1.

Examples

			3+1/a(0)=22/7
3+1/a(0)+1/a(1)=333/106
3+1/a(0)+1/a(1)+1/a(2)=355/113
		

Crossrefs

Cf. A001466, A014013, A156019, A156020, A002485, A002486.

Programs

PARI

c0=3; for (k=2,30,m=contfracpnqn(contfrac(Pi,k));c1=m[1,1]/m[2,1];print1(1/(c1-c0),", ");c0=c1;)