id:A046447 - OEIS Search Results

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Apart from initial term, composite numbers with property that concatenation of prime factors is a palindrome.

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11

1, 4, 8, 9, 16, 25, 27, 32, 39, 49, 64, 69, 81, 119, 121, 125, 128, 129, 159, 219, 243, 249, 256, 259, 329, 339, 343, 403, 429, 469, 507, 512, 625, 669, 679, 729, 795, 1024, 1207, 1309, 1329, 1331, 1533, 1547, 1587, 1589, 1703, 2023, 2048, 2097, 2187, 2319 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`E.g. 81 = 3 * 3 * 3 * 3 -> 3333 is palindromic.`
	CROSSREFS	`Cf. A046448, A046449, A046450.` `Sequence in context: A075309 A175031 A052054 this_sequence A087244 A080062 A088949` `Adjacent sequences: A046444 A046445 A046446 this_sequence A046448 A046449 A046450`
	KEYWORD	`nonn,nice,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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