1,2
P. De Geest, Palindromic Tetrahedrals
Cf. A006029.
Sequence in context: A159706 A188978 A202684 * A180268 A087365 A024059
Adjacent sequences: A006027 A006028 A006029 * A006031 A006032 A006033
nonn,base
Patrick De Geest (pdg(AT)worldofnumbers.com)