A115012 - OEIS

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A115012

Sum_{i=1..n, gcd(5,i)=1} i.

1, 3, 6, 10, 10, 16, 23, 31, 40, 40, 51, 63, 76, 90, 90, 106, 123, 141, 160, 160, 181, 203, 226, 250, 250, 276, 303, 331, 360, 360, 391, 423, 456, 490, 490, 526, 563, 601, 640, 640, 681, 723, 766, 810, 810, 856, 903, 951, 1000, 1000, 1051, 1103, 1156, 1210, 1210, 1266

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Replacing 5 in the definition by 2, 3, 4, 5, 6, 7, 8, 9 gives respectively A008794, A068626, A008794, this sequence, A115014, A115015, A008794, A068626.

Sequence in context: A360946 A032570 A130483 * A200723 A135738 A307574

Adjacent sequences: A115009 A115010 A115011 * A115013 A115014 A115015

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 24 2006

STATUS

approved