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A024052 5^n - n^3. 1
1, 4, 17, 98, 561, 3000, 15409, 77782, 390113, 1952396, 9764625, 48826794, 244138897, 1220700928, 6103512881, 30517574750, 152587886529, 762939448212, 3814697259793, 19073486321266, 95367431632625 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..300

FORMULA

G.f.:(1+6*x^4+15*x^3+7*x^2-5*x)/((1-5*x)*(1-x)^4) [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 13 2009]

a(n) = +9*a(n-1) -26*a(n-2) +34*a(n-3) -21*a(n-4) +5*a(n-5)

PROG

(MAGMA) [5^n-n^3: n in [0..35]]; // Vincenzo Librandi, Jun 12 2011

CROSSREFS

Sequence in context: A020011 A067084 A123750 * A128321 A091635 A127676

Adjacent sequences:  A024049 A024050 A024051 * A024053 A024054 A024055

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 10:57 EST 2012. Contains 206009 sequences.