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A168350 Sum of first n non-single or nonisolated numbers. 0
0, 1, 4, 9, 16, 24, 33, 43, 54, 67, 81, 96, 112, 129, 148, 168, 189, 211, 235, 260, 286, 313, 341, 370, 401, 433, 466, 500, 535, 571, 609, 648, 688, 729, 772, 816, 861, 907, 955, 1004, 1054, 1105, 1157, 1211, 1266, 1322, 1379, 1437, 1496, 1557, 1619, 1682 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..52.

FORMULA

a(n)=sum{j=1..n} A167707(j).

EXAMPLE

a(1)=0, a(2)=0+1=1, a(3)=0+1+3=4.

CROSSREFS

Cf. A167707.

Sequence in context: A320891 A161697 A078593 * A281151 A052117 A033611

Adjacent sequences:  A168347 A168348 A168349 * A168351 A168352 A168353

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Nov 23 2009

EXTENSIONS

Formula and A-number corrected and entries checked by R. J. Mathar, Nov 24 2009

STATUS

approved

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)