A015497 - OEIS

This site is supported by donations to The OEIS Foundation.

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.

Other ways to donate

A015497

a(0)=1, a(1)=9, a(n) = sum_{k=0}^{k=n-1} 9^k a(k).

1, 9, 82, 6724, 4908520, 32209708240, 1901983271572000, 1010793793810766824000, 4834596391983083396187280000, 208113526867898819658489702096160000, 80627444554789525982513713046048334318400000 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..10.`
	FORMULA	`a(n) = (9^(n-2) + 1) * a(n-1). - Vincenzo Librandi, Nov 11 2012`
	PROG	`(MAGMA) I:=[1, 9, 82]; [n le 3 select I[n] else (9^(n-2)+1)*Self(n-1): n in [1..15]]; // Vincenzo Librandi, Nov 11 2012`
	CROSSREFS	`Sequence in context: A308481 A041146 A320991 * A174472 A039357 A048353` `Adjacent sequences: A015494 A015495 A015496 * A015498 A015499 A015500`
	KEYWORD	`nonn,easy`
	AUTHOR	`Olivier Gérard`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 5 15:11 EST 2019. Contains 329753 sequences. (Running on oeis4.)