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2, 6, 342, 8372, 15006, 32942, 45156, 170982, 369056, 3008490, 3954132, 644931420, 2009953056, 12824996256, 688604539866900, 11580326725041402, 26067179544075560, 94815133778597582, 502907499251402082, 3337168950979864272, 7864766939956291580
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MAPLE
| A000265 := proc(n) local nshft ; if n mod 2 = 1 then RETURN(n); else nshft := n ; while nshft mod 2 = 0 do nshft := nshft/2 ; od ; RETURN(nshft) ; fi ; end: A135013 := proc(n) option remember ; if n = 1 then RETURN(1) ; else RETURN( A135013(n-1)+A000265(n)) ; fi ; end: isA002378 := proc(n) RETURN( issqr(1+4*n) ) ; end: for n from 1 do a135013 := A135013(n) ; if isA002378(a135013) then printf("%d, ", a135013) ; fi ; od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2008
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CROSSREFS
| Cf. A000918, A002378, A135013.
Sequence in context: A007190 A164829 A028337 * A092024 A069261 A053608
Adjacent sequences: A135011 A135012 A135013 * A135015 A135016 A135017
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 10 2008
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2008
a(15)-a(19) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Aug 08 2010
a(20)-a(21) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jul 24 2011
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