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A070927 Second palindromic prime pyramids with a(1)=2 such that (number of digits in a(n+1)) = (number of digits in a(n)) + 2. 3
2, 929, 39293, 3392933, 733929337 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
There are only 2 palindromic prime pyramids beginning with 2 (each one is finite with 5 elements).
REFERENCES
G. L. Honaker Jr. and C. Caldwell, Palindromic prime pyramids, J. Recreational Mathematics, vol. 30.3, pp. 169-176, 1999-2000.
J.-P. Delahaye, "Pour la science", (French edition of Scientific American), Juin 2002, p. 99.
LINKS
CROSSREFS
Cf. A070922.
Sequence in context: A159723 A282346 A070967 * A070922 A332192 A258586
KEYWORD
easy,fini,full,nonn,base
AUTHOR
Benoit Cloitre, May 24 2002
STATUS
approved

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Last modified July 13 22:24 EDT 2024. Contains 374288 sequences. (Running on oeis4.)