id:A063013 - OEIS Search Results

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Numbers where k-th digit from right is either 0 or k.

+0
2

0, 1, 20, 21, 300, 301, 320, 321, 4000, 4001, 4020, 4021, 4300, 4301, 4320, 4321, 50000, 50001, 50020, 50021, 50300, 50301, 50320, 50321, 54000, 54001, 54020, 54021, 54300, 54301, 54320, 54321, 600000, 600001, 600020, 600021, 600300 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n) = a(n-2^[log2(n)])+[log2(n)+1]*10^[log2(n)]`
	EXAMPLE	`a(11) = 4021 since 11 is written as 1011 in binary and the 1's can then be replaced by the relevant digits`
	CROSSREFS	`Cf. A063012.` `Sequence in context: A041832 A082260 A041834 this_sequence A028931 A063012 A041836` `Adjacent sequences: A063010 A063011 A063012 this_sequence A063014 A063015 A063016`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jul 04 2001`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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