id:A054901 - OEIS Search Results

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Numbers of the form 2^i*5^j where i+j is even.

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1, 4, 10, 16, 25, 40, 64, 100, 160, 250, 256, 400, 625, 640, 1000, 1024, 1600, 2500, 2560, 4000, 4096, 6250, 6400, 10000, 10240, 15625, 16000, 16384, 25000, 25600, 40000, 40960, 62500, 64000, 65536, 100000, 102400, 156250, 160000, 163840 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`m is in the sequence iff m/10 is already in the sequence or m is a power of 4 or 25`
	CROSSREFS	`Cf. A003592, A000302, A009969, A054774.` `Sequence in context: A161644 A049881 A067274 this_sequence A019574 A095273 A076577` `Adjacent sequences: A054898 A054899 A054900 this_sequence A054902 A054903 A054904`
	KEYWORD	`easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), May 23 2000`

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.

AT&T Labs Research