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 A122592 a(n) = a(n-1) - 2*a(n-1) + a(n-3) + (a(n-2) - a(n-1))^2 + (a(n-2) - a(n-3))^2. 0
 1, 1, 1, 0, 2, 4, 4, 2, 6, 18, 144, 15882, 247684656, 61339821614663208, 3762573685332838515711641628032454, 14156960737559137644661747812427568488753428461913274274176986277422 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS MATHEMATICA a[0] = 1; a[1] = 1; a[2] = 1; a[n_] := a[n] = a[n - 1] - 2*a[n - 1] + a[n - 3] + (a[n - 2] - a[n - 1])^2 + (a[n - 2] - a[n - 3])^2; Table[a[n], {n, 0, 17}] RecurrenceTable[{a[1]==a[2]==a[3]==1, a[n]==-a[n-1]+a[n-3]+(a[n-2]-a[n-1])^2+(a[n-2]-a[n-3])^2}, a, {n, 20}] (* Harvey P. Dale, Dec 18 2012 *) CROSSREFS Sequence in context: A206389 A206503 A323938 * A099264 A011172 A193028 Adjacent sequences:  A122589 A122590 A122591 * A122593 A122594 A122595 KEYWORD nonn AUTHOR Roger L. Bagula, Sep 19 2006 EXTENSIONS Edited by N. J. A. Sloane, Sep 21 2006 Definition corrected by Harvey P. Dale, Dec 18 2012 STATUS approved

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Last modified May 11 18:21 EDT 2021. Contains 343808 sequences. (Running on oeis4.)