A006029 Numbers k such that the k-th tetrahedral number k*(k+1)*(k+2)/6 is palindromic.

1, 2, 17, 21, 336

Offset

1,2

Comments

No more terms to 10^10. - Charles R Greathouse IV, Mar 23 2011

Links

Table of n, a(n) for n=1..5.

Patrick De Geest, Palindromic Tetrahedrals

Mathematica

Select[Range[350], PalindromeQ[(#(#+1)(#+2))/6]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 02 2018 *)

Crossrefs

Cf. A006030.

Sequence in context: A309055 A157191 A371478 * A332094 A126961 A106622

Adjacent sequences: A006026 A006027 A006028 * A006030 A006031 A006032

Keyword

nonn,base,more

Author

Patrick De Geest

Status

approved