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 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 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

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