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Search: id:A077003
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| 1, 1, 1, 2, 4, 9, 22, 59, 167, 501, 1585, 5258, 18215, 65676, 245738, 951740, 3806961, 15696503, 66594623, 290279233, 1298168196, 5948954024, 27903067710, 133818411722, 655573653819, 3277868269096, 16713914267109, 86848046111951
(list; graph; listen)
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OFFSET
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1,4
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MAPLE
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a[1] := 1:b[1] := 1:for n from 2 to 100 do a[n] := floor(evalf(-1/2+1/2*sqrt(1+8*(n-1)*a[n-1])+1/10^50, 300)):b[n] := a[n]:a[n] := a[n]*(a[n]+1)/2:od:seq(b[l], l=1..100);
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CROSSREFS
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Cf. A077002.
Sequence in context: A092920 A035053 A000571 this_sequence A046917 A159329 A159334
Adjacent sequences: A077000 A077001 A077002 this_sequence A077004 A077005 A077006
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 26 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 26 2003
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