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A154599 2*n^2+20*n+8. 0
30, 56, 86, 120, 158, 200, 246, 296, 350, 408, 470, 536, 606, 680, 758, 840, 926, 1016, 1110, 1208, 1310, 1416, 1526, 1640, 1758, 1880, 2006, 2136, 2270, 2408, 2550, 2696, 2846, 3000, 3158, 3320, 3486, 3656, 3830, 4008, 4190, 4376, 4566, 4760, 4958, 5160 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Tenth diagonal [A144562]; 2*a(n)+84 is a square

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

a(n)= 2*A127147(n+13).

G.f. -2*x*(4*x-5)*(x-3)/(x-1)^3.

CROSSREFS

Cf. A144562, A153238, A067076

Sequence in context: A027578 A189712 A029713 * A031126 A048451 A154796

Adjacent sequences:  A154596 A154597 A154598 * A154600 A154601 A154602

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 12 2009

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Last modified February 16 15:27 EST 2012. Contains 205930 sequences.