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.
CROSSREFS
KEYWORD
easy,fini,full,nonn,base
AUTHOR
Benoit Cloitre, May 24 2002
STATUS
approved