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A093467
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a(1) = 1, a(2) = 2; for n >= 2, a(n+1) = a(n) + Sum {a(i)-a(1), i = 1 to n}.
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1
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1, 2, 3, 6, 14, 35, 90, 234, 611, 1598, 4182, 10947, 28658, 75026, 196419, 514230, 1346270, 3524579, 9227466, 24157818, 63245987, 165580142, 433494438, 1134903171, 2971215074, 7778742050, 20365011075, 53316291174, 139583862446
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = 3*a(n-1)-a(n-2)-1, n > 3. - Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 08 2004
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MATHEMATICA
| a[1] = 1; a[2] = 2; a[n_] := a[n] = a[n - 1] + Sum[a[i] - a[1], {i, n - 1}]; Table[ a[n], {n, 30}]
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CROSSREFS
| Cf. A093468.
Essentially the same as A032908.
Sequence in context: A010357 A190166 A002995 * A080408 A001420 A049339
Adjacent sequences: A093464 A093465 A093466 * A093468 A093469 A093470
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 07 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 08 2004
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