id:A069207 - OEIS Search Results

Search: id:A069207

Displaying 1-1 of 1 results found.

page 1

Numbers n such that n^2 + (reversal of n)^2 is prime. Ignore leading 0's.

+0
1

1, 10, 14, 23, 25, 32, 41, 52, 58, 85, 104, 116, 124, 164, 170, 190, 194, 205, 227, 233, 283, 310, 320, 328, 332, 380, 382, 398, 401, 409, 419, 421, 425, 461, 491, 499, 502, 508, 518, 524, 598, 611, 689, 710, 722, 728, 758, 778, 805, 815, 823, 827, 857, 877 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`14^2 + 41^2 = 1877, a prime, so 14 belongs to the sequence.`
	MATHEMATICA	`Select[Range[10^3], PrimeQ[ #^2 + FromDigits[Reverse[IntegerDigits[ # ]]]^2] &]`
	CROSSREFS	`Sequence in context: A151740 A136802 A084278 this_sequence A136197 A071620 A053690` `Adjacent sequences: A069204 A069205 A069206 this_sequence A069208 A069209 A069210`
	KEYWORD	`base,nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Apr 10 2002`

page 1

Search completed in 0.002 seconds

Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research