id:A055851 - OEIS Search Results

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a(n) and floor[a(n)/6] are both squares; i.e. squares which remain squares when written in base 6 and last digit is removed.

+0
2

0, 1, 4, 9, 25, 100, 729, 2401, 9604, 71289, 235225, 940900, 6985449, 23049601, 92198404, 684502569 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`a(5) = 100 because 100 = 10^2 = 244 base 6 and 24 base 6 = 16 = 4^2`
	CROSSREFS	`Cf. A023110.` `Sequence in context: A028400 A117678 A167045 this_sequence A025494 A087374 A081948` `Adjacent sequences: A055848 A055849 A055850 this_sequence A055852 A055853 A055854`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jul 14 2000`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.