A141250 - OEIS

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A141250

Prime powers related to minimal visibility in the square n X n lattice.

11, 17, 23, 37, 41, 97, 101, 121, 137, 157, 191, 211, 223, 227, 331, 347, 431, 443, 457 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`So far 121 is the only nonprime here. The numbers in A141249 greater than 1 are 2*a(n)-1.`
	CROSSREFS	`Cf. A141246.` `Sequence in context: A076812 A074207 A063638 * A096454 A099722 A031505` `Adjacent sequences: A141247 A141248 A141249 * A141251 A141252 A141253`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Jun 17 2008`

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Last modified February 16 10:53 EST 2012. Contains 205904 sequences.