A080231 Engel expansion for (negative) constant defined in A078756.

-1, -2, -3, -4, -9, -11, -17, -82, -86, -89, -259, -1031, -1493, -3088, -18107, -3128320, -4245574, -4430458, -6692218, -6908807, -20282631, -55597679, -73203786, -80410013, -92821351, -192936649, -5039379072, -30234138756, -55272287466, -202248991637

Offset: 1

Author

Jon Perry, Feb 08 2003

Keywords

• sign

Crossrefs

Cf. A006784, A078756, A080320.

Programs

PARI

x=vector(31); a=vector(30); x[1]=-0.62923321313860758778445822033246963679442280615921 for (i=1,30,a[i]=ceil(1/x[i]); x[i+1]=x[i]*a[i]-1); x

Formula

See A006784 for definition of Engel expansion