A077391 - OEIS

This site is supported by donations to The OEIS Foundation.

A077391

Smallest n-digit prime which leaves a prime at every step if most significant digit and least significant digit are deleted until a one digit or two digit prime is obtained, or 0 if no such prime exists.

2, 11, 127, 1021, 10313, 100237 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Conjecture: No term is zero.`
	EXAMPLE	`a(6) = 100237: this is the smallest 6-digit number such that deleting MSD and LSD yields prime at every step, i.e. 100237, 0023, 02 all are primes.`
	CROSSREFS	`Cf. A077390.` `Sequence in context: A206401 A193207 A112864 * A104087 A154596 A066382` `Adjacent sequences: A077388 A077389 A077390 * A077392 A077393 A077394`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 07 2002`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 19:15 EST 2012. Contains 205852 sequences.