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A164096 Partial sums of A164095. 3
5, 11, 21, 33, 53, 77, 117, 165, 245, 341, 501, 693, 1013, 1397, 2037, 2805, 4085, 5621, 8181, 11253, 16373, 22517, 32757, 45045, 65525, 90101, 131061, 180213, 262133, 360437, 524277, 720885, 1048565, 1441781, 2097141, 2883573, 4194293, 5767157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = 2*a(n-2)+11 for n > 2; a(1) = 5, a(2) = 11.

a(n) = (27-5*(-1)^n)*2^(1/4*(2*n-1+(-1)^n))/2-11.

G.f.: x*(5+6*x)/(1-x-2*x^2+2*x^3).

PROG

(MAGMA) T:=[ n le 2 select n+4 else 2*Self(n-2): n in [1..38] ]; [ n eq 1 select T[1] else Self(n-1)+T[n]: n in [1..#T]];

CROSSREFS

Cf. A164095.

Sequence in context: A139534 A245773 A166480 * A298785 A163787 A166863

Adjacent sequences:  A164093 A164094 A164095 * A164097 A164098 A164099

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, Aug 10 2009

STATUS

approved

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Last modified April 5 13:02 EDT 2020. Contains 333241 sequences. (Running on oeis4.)