A134245 Terms in A007468 which are multiples of their indices.

2, 8, 88, 384, 1056, 2310, 207936, 417219, 2978610, 6215400, 9216124, 205006774, 255230655, 576178034, 1157525280, 2038109955, 3053762208, 10584038058, 25042362120, 1025402527504, 2304427934330, 11623068703428

Offset: 1

Author

Enoch Haga, Oct 15 2007, Oct 16 2007

Keywords

• nonn

Comments

If A007468(j) is a multiple of j, we add A007468(j) to this sequence. This sequence is a subsequence of A007468. - R. J. Mathar, Nov 16 2007

Examples

			3+5=8 is a multiple of i=2 and is added to the sequence. 7+11+13 is not a multiple of 3 and is skipped. 17+19+23+29=88 is a multiple of 4 and is added to the sequence. 31+37+41+43+47=199 is not a multiple of 5 and is skipped.
		

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..28

Crossrefs

Cf. A134244, A134246, A007468.

Programs

Maple

A000217 := proc(n) n*(n+1)/2 ; end: A007468 := proc(n) add( ithprime(j),j=A000217(n-1)+1..A000217(n)) ; end: for n from 1 to 800 do a := A007468(n) ; if a mod n =0 then printf("%d, ",a) ; fi ; od: # R. J. Mathar, Nov 16 2007

Formula

a(n) = A007468(A134244(n)).

Extensions

Edited and corrected by R. J. Mathar, Nov 16 2007

Corrected by R. J. Mathar, Nov 16 2007

Edited by Max Alekseyev, Nov 08 2011