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A032758 Undulating primes (digits alternate). +0
32
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 18181, 32323, 35353, 72727, 74747, 78787, 94949, 95959, 1212121, 1616161, 323232323, 383838383 (list; graph; listen)
OFFSET

0,1

COMMENT

Sometimes called "smoothly undulating primes", to distinguish them from A059168.

REFERENCES

C. A. Pickover, "Keys to Infinity", Wiley 1995, p. 159,160.

C. A. Pickover, "Wonders of Numbers", Oxford New York 2001, Chapter 52, pp. 123-124, 316-317.

LINKS

C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review

CROSSREFS

Cf. A033619, A030291.

Sequence in context: A049585 A049549 A030291 this_sequence A052085 A082646 A038618

Adjacent sequences: A032755 A032756 A032757 this_sequence A032759 A032760 A032761

KEYWORD

nonn,base,easy

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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