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A130482 Sum {0<=k<=n, k mod 4} (Partial sums of A010873). +0
26
0, 1, 3, 6, 6, 7, 9, 12, 12, 13, 15, 18, 18, 19, 21, 24, 24, 25, 27, 30, 30, 31, 33, 36, 36, 37, 39, 42, 42, 43, 45, 48, 48, 49, 51, 54, 54, 55, 57, 60, 60, 61, 63, 66, 66, 67, 69, 72, 72, 73, 75, 78, 78, 79, 81, 84, 84, 85, 87, 90, 90, 91, 93, 96, 96, 97, 99, 102, 102, 103, 105 (list; graph; listen)
OFFSET

0,3

LINKS

Index entries for sequences related to linear recurrences with constant coefficients

FORMULA

a(n)=6*floor(n/4)+A010873(n)*(A010873(n)+1)/2. G.f.: g(x)=(3x^3+2x^2+x)/((1-x^4)(1-x)).

MAPLE

a:=n->add(chrem( [n, j], [1, 4] ) , j=1..n):seq(a(n), n=0..70); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 07 2009]

CROSSREFS

Cf. A010872, A010874, A010875, A010876, A010877. A130481, A130483, A130484, A130485.

Sequence in context: A079093 A153035 A072910 this_sequence A025500 A147866 A135702

Adjacent sequences: A130479 A130480 A130481 this_sequence A130483 A130484 A130485

KEYWORD

nonn

AUTHOR

Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), May 29 2007

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.


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