program for this calculation. This program could be easily modified for a screened Coulomb potential of a more general form
-1/r + v1 delta + v2 delta2 r + v3 delta3 r2 + ... + vN deltaN rN-1.
102 - 110 coefficients for 1s (the ground state, n=1, l=0), 2s (n=2, l=0), and 2p (n=2, l=1) states in exact form calculated earlier
150 coefficients for the ground state of Yukawa potential calculated earlier
On-line calculation of Rayleigh - Schrödinger perturbation series
Designed by A. Sergeev