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A077002
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a(1) = 1, a(n+1) is the largest triangular number <= n*a(n).
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1
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1, 1, 1, 3, 10, 45, 253, 1770, 14028, 125751, 1256905, 13825911, 165902220, 2156701326, 30193705191, 452904989670, 7246477931241, 123190111062756, 2217421939553376, 42131016700673761, 842620333202031306
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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MAPLE
| a[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)):a[n] := a[n]*(a[n]+1)/2:od:seq(a[l], l=1..100);
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CROSSREFS
| Cf. A077003.
Sequence in context: A099237 A006220 A020026 * A003704 A000250 A118601
Adjacent sequences: A076999 A077000 A077001 * A077003 A077004 A077005
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 26 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 26 2003
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