

A071067


First highest palindromic prime pyramid with a(1)=2 such that (number of digits in a(n+1)) = (number of digits in a(n)) + 4.


0



2, 70207, 357020753, 9635702075369, 33963570207536933, 723396357020753693327, 1272339635702075369332721, 97127233963570207536933272179, 119712723396357020753693327217911
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OFFSET

1,1


COMMENTS

There are 2 such highest "Palindromic prime pyramid" (beginning with 2) with 26 elements.


REFERENCES

G. L. Honaker Jr. and C. Caldwell, Palindromic prime pyramids, J. Recreational Mathematics, vol. 30.3, 19992000, pp. 169176.
J.P. Delahaye, "Pour la science", (French edition of Scientific American), Juin 2002, p. 99


LINKS

Table of n, a(n) for n=1..9.


CROSSREFS

Cf. A070927, A070922.
Sequence in context: A272137 A272248 A195003 * A060069 A231612 A170995
Adjacent sequences: A071064 A071065 A071066 * A071068 A071069 A071070


KEYWORD

fini,nonn,base


AUTHOR

Benoit Cloitre, May 26 2002


STATUS

approved



