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A006029 Numbers k such that the k-th tetrahedral number k*(k+1)*(k+2)/6 is palindromic. 1
1, 2, 17, 21, 336 (list; graph; refs; listen; history; text; internal format)
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: A340044 A309055 A157191 * A332094 A126961 A106622

Adjacent sequences:  A006026 A006027 A006028 * A006030 A006031 A006032

KEYWORD

nonn,base,more

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified May 18 19:51 EDT 2022. Contains 353824 sequences. (Running on oeis4.)