A125823 - OEIS

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A125823

Numbers whose base 7 representation is 4444....4.

0, 4, 32, 228, 1600, 11204, 78432, 549028, 3843200, 26902404, 188316832, 1318217828, 9227524800, 64592673604, 452148715232, 3165041006628, 22155287046400, 155087009324804, 1085609065273632, 7599263456915428 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n)=4(7^(n-1)-1)/6.` `a(n)=7a(n-1)+4 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 30 2010]`
	EXAMPLE	`Base 7.................decimal` `0.........................0` `4.........................4` `44.......................32` `444.....................228` `4444...................1600` `44444.................11204` `444444................78432` `4444444..............549028` `44444444............3843200` `etc....................etc...`
	MAPLE	`seq(4*(7^n-1)/6, n=0..21);`
	CROSSREFS	`Sequence in context: A098981 A120917 A099269 * A033515 A147551 A007278` `Adjacent sequences: A125820 A125821 A125822 * A125824 A125825 A125826`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 03 2007`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.