login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A075682 First differences of A075681. 0
0, 2, 19, 39, 61, 86, 114, 145, 179, 216, 256, 299, 345, 394, 446, 501, 559, 620, 684, 751, 821, 894, 970, 1049, 1131, 1216, 1304, 1395, 1489, 1586, 1686, 1789, 1895, 2004, 2116, 2231, 2349, 2470, 2594, 2721, 2851, 2984, 3120, 3259, 3401, 3546 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..46.

Ed Pegg Jr., Pancakes

Index entries for linear recurrences with constant coefficients, signature (3,-3,1)

FORMULA

For n>3, a(n) = 3n^2/2 + 17n/2 - 19. - Ralf Stephan

EXAMPLE

a[4]=21, a[5]=60 from the original sequence, hence a[4]=39

MATHEMATICA

Join[{0, 2, 19}, LinearRecurrence[{3, -3, 1}, {39, 61, 86}, 50]] (* Harvey P. Dale, Aug 26 2014 *)

CROSSREFS

Sequence in context: A240552 A107143 A018610 * A062587 A109946 A141067

Adjacent sequences:  A075679 A075680 A075681 * A075683 A075684 A075685

KEYWORD

nonn

AUTHOR

Jon Perry, Oct 12 2002

EXTENSIONS

More terms from Ralf Stephan

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 28 19:16 EDT 2021. Contains 347717 sequences. (Running on oeis4.)