id:A085248 - OEIS Search Results

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Left truncatable 3-almost primes, in which repeatedly deleting the leftmost digit gives a 3-almost at every step until a single digit 3-almost prime remains.

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8, 18, 28, 68, 78, 98, 268, 318, 418, 428, 498, 518, 578, 598, 618, 628, 668, 678, 978, 1268, 1498, 1578, 1598, 1978, 2318, 2428, 2598, 2678, 3428, 3598, 3628, 3678, 4318, 4418, 4498, 4978, 5518, 5618, 5678, 6268, 6428, 6618, 6628, 6668, 6978, 7498, 7598 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`Angell, I. O. and Godwin, H. J. "On Truncatable Primes." Math. Comput. 31, 265-267, 1977.`
	LINKS	`Index entries for sequences related to truncatable primes`
	EXAMPLE	`a(7)=268 is a term because 268,68 and 8 are all 3-almost primes.`
	CROSSREFS	`Sequence in context: A043521 A017365 A084394 this_sequence A092163 A100592 A028563` `Adjacent sequences: A085245 A085246 A085247 this_sequence A085249 A085250 A085251`
	KEYWORD	`nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 11 2003`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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