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A006029 Numbers n such that n-th tetrahedral number n*(n+1)*(n+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.

P. 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: A042055 A075683 A157191 * A126961 A106622 A040992

Adjacent sequences:  A006026 A006027 A006028 * A006030 A006031 A006032

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified November 19 14:52 EST 2018. Contains 317352 sequences. (Running on oeis4.)