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A177061 Primes p formed from single-digit primes only, each used at most once. 1
2, 3, 5, 7, 23, 37, 53, 73, 257, 523, 2357, 2753, 3257, 3527, 5237, 7253, 7523 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

List of (p,i):

(2,1), (3,2), (5,3), (7,4), (23,9), (37,12), (53,16), (73,21), (257,55), (523,99),

(2357,350), (2753,402), (3257,460), (3527,492), (5237,697), (7253,928), (7523,953)

REFERENCES

E. I. Ignatjew, Mathematische Spielereien, Urania Verlag Leipzig/Jena/Berlin 1982

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

3//7 = 37 = prime(12) is the 6th term.

2//3//5//7 = 2357 = prime(350) is the 11th term

p = 7//5//2//3 = 7523 = prime(953) = A033548(59) is the last term.

CROSSREFS

Cf. A000040, A168349, A168385

Sequence in context: A096148 A211681 A124674 * A020994 A085823 A284060

Adjacent sequences:  A177058 A177059 A177060 * A177062 A177063 A177064

KEYWORD

easy,base,fini,full,nonn

AUTHOR

Eva-Maria Zschorn (e-m.zschorn(AT)zaschendorf.km3.de), May 02 2010

EXTENSIONS

Edited by Assoc. Eds. OEIS, May 09 2010

STATUS

approved

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Last modified March 21 04:59 EDT 2019. Contains 321364 sequences. (Running on oeis4.)