SLATEC Routines --- DPSIXN ---

*DECK DPSIXN
      DOUBLE PRECISION FUNCTION DPSIXN (N)
C***BEGIN PROLOGUE  DPSIXN
C***SUBSIDIARY
C***PURPOSE  Subsidiary to DEXINT
C***LIBRARY   SLATEC
C***TYPE      DOUBLE PRECISION (PSIXN-S, DPSIXN-D)
C***AUTHOR  Amos, D. E., (SNLA)
C***DESCRIPTION
C
C     This subroutine returns values of PSI(X)=derivative of log
C     GAMMA(X), X.GT.0.0 at integer arguments. A table look-up is
C     performed for N .LE. 100, and the asymptotic expansion is
C     evaluated for N.GT.100.
C
C***SEE ALSO  DEXINT
C***ROUTINES CALLED  D1MACH
C***REVISION HISTORY  (YYMMDD)
C   800501  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890911  Removed unnecessary intrinsics.  (WRB)
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900328  Added TYPE section.  (WRB)
C   910722  Updated AUTHOR section.  (ALS)
C***END PROLOGUE  DPSIXN