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A066237 First differences give A052849. 0
1, 3, 7, 19, 67, 307, 1747, 11827, 92467, 818227, 8075827, 87909427, 1045912627, 13499954227, 187856536627, 2803205272627, 44648785048627, 756023641240627, 13560771052696627, 256850971870360627, 5122654988223640627 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..21.

FORMULA

a(n) = n*a(n-1)-(n-1)*a(n-2), a(0)=-1, a(1)=1. a(n)=2*A003422(n)-1. - Vladeta Jovovic, Dec 20 2001

CROSSREFS

Sequence in context: A051139 A049423 A121825 * A135741 A163571 A217611

Adjacent sequences:  A066234 A066235 A066236 * A066238 A066239 A066240

KEYWORD

nonn,easy,changed

AUTHOR

Markus Sullivan (markus(AT)o-reading.co.uk), Dec 19 2001

EXTENSIONS

More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jan 13 2002

STATUS

approved

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Last modified May 19 00:49 EDT 2013. Contains 225428 sequences.