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 A096320 a(n) = (n^2+n+4)/2, modulo 10. 1
 2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7, 2, 8, 5, 3, 2, 2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7, 2, 8, 5, 3, 2, 2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7, 2, 8, 5, 3, 2, 2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7, 2, 8, 5, 3, 2, 2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7, 2, 8, 5, 3, 2, 2, 3, 5, 8, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This periodic sequence equals A008954(n)+2 modulo 10 and also A061501(n+1)+1 modulo 10. LINKS Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1). FORMULA a(0)=2, a(1)=3, a(2)=5, a(3)=8, a(4)=2, a(5)=7, a(6)=3, a(7)=0, a(8)=8, a(9)=7, a(10)=7, a(11)=8, a(12)=0, a(13)=3, a(14)=7, a(n)=a(n-5)-a(n-10)+ a(n-15). - Harvey P. Dale, Nov 16 2012 MATHEMATICA Table[Mod[(n^2+n+4)/2, 10], {n, 0, 110}] (* or *) LinearRecurrence[ {0, 0, 0, 0, 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1}, {2, 3, 5, 8, 2, 7, 3, 0, 8, 7, 7, 8, 0, 3, 7}, 110] (* Harvey P. Dale, Nov 16 2012 *) CROSSREFS Cf. A008954, A061501. Sequence in context: A098978 A111301 A247193 * A105955 A003893 A152303 Adjacent sequences:  A096317 A096318 A096319 * A096321 A096322 A096323 KEYWORD nonn,easy,less AUTHOR Cino Hilliard, Aug 02 2004 EXTENSIONS Edited by Don Reble, Apr 16 2007 STATUS approved

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Last modified January 18 13:25 EST 2022. Contains 350455 sequences. (Running on oeis4.)