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A066237

First differences give A052849.

1, 3, 7, 19, 67, 307, 1747, 11827, 92467, 818227, 8075827, 87909427, 1045912627, 13499954227, 187856536627, 2803205272627, 44648785048627, 756023641240627, 13560771052696627, 256850971870360627, 5122654988223640627

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OFFSET

1,2

COMMENTS

Partial sums of A098558. - Sébastien Desbordes, Dec 18 2023

LINKS

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

Sébastien Desbordes, Showing why it is the partial sums of A098558

FORMULA

From Vladeta Jovovic, Dec 20 2001: (Start)

a(n) = n*a(n-1) - (n-1)*a(n-2), a(0)=-1, a(1)=1.

a(n) = 2*A003422(n) - 1. (End)

MATHEMATICA

RecurrenceTable[{a[0]==-1, a[1]==1, a[n]==n*a[n-1]-(n-1)a[n-2]}, a, {n, 30}] (* Harvey P. Dale, Dec 10 2013 *)

CROSSREFS

Cf. A003422, A052849, A098558, A052582.

Sequence in context: A051139 A049423 A121825 * A362137 A341323 A135741

Adjacent sequences: A066234 A066235 A066236 * A066238 A066239 A066240

KEYWORD

nonn,easy

AUTHOR

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

EXTENSIONS

More terms from Jason Earls, Jan 13 2002

STATUS

approved

URL: https://oeis.org/A066237

⇱ A066237 - OEIS