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 A169607 7*A000330(n). 3
 0, 7, 35, 98, 210, 385, 637, 980, 1428, 1995, 2695, 3542, 4550, 5733, 7105, 8680, 10472, 12495, 14763, 17290, 20090, 23177, 26565, 30268, 34300, 38675, 43407, 48510, 53998, 59885, 66185, 72912, 80080, 87703, 95795, 104370, 113442, 123025, 133133, 143780, 154980, 166747, 179095 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS From R. J. Mathar, Jun 30 2013: (Start) The array view of A001477 is   0,  2,  5,  9, 14, 20,   1,  4,  8, 13, 19, 26,   3,  7, 12, 18, 25, 33,   6, 11, 17, 24, 32, 41, 10, 16, 23, 31, 40, 50, 15, 22, 30, 39, 49, 60, and a(n) is the hook sum_{k=0..n} A(n,k) + sum_{r=0..n-1} A(r,n).  (End) LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1). FORMULA G.f.: 7*x*(1+x)/(x-1)^4. a(n) = sum_{k=0..n} A169603(n,k). a(n) = 4*a(n-1) -6*a(n-2) +4*a(n-3) -a(n-4). - Vincenzo Librandi, Jul 02 2012 MATHEMATICA CoefficientList[Series[7*x*(1+x)/(x-1)^4, {x, 0, 50}], x] (* Vincenzo Librandi, Jul 02 2012 *) PROG (MAGMA)  I:=[0, 7, 35, 98]; [n le 4 select I[n] else 4*Self(n-1)-6*Self(n-2)+4*Self(n-3)-Self(n-4): n in [1..50]]; // Vincenzo Librandi, Jul 02 2012 CROSSREFS Sequence in context: A077536 A256391 A152744 * A130884 A037092 A210368 Adjacent sequences:  A169604 A169605 A169606 * A169608 A169609 A169610 KEYWORD nonn,easy AUTHOR Paul Curtz, Dec 03 2009 STATUS approved

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)