1,2
P. De Geest, Palindromic Tetrahedrals
Cf. A006030.
Sequence in context: A042055 A075683 A157191 * A126961 A106622 A040992
Adjacent sequences: A006026 A006027 A006028 * A006030 A006031 A006032
nonn,base
Patrick De Geest (pdg(AT)worldofnumbers.com)
No more terms to 10^10. Charles R Greathouse IV, Mar 23, 2011