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A091464 a(n) is the smallest j such that 1/2 + 1/5 + 1/8 + ... + 1/j exceeds n. 4

%I #11 Dec 26 2019 14:44:15

%S 17,323,6506,130664,2624438,52713275,1058774426,21266052797,

%T 427140088670

%N a(n) is the smallest j such that 1/2 + 1/5 + 1/8 + ... + 1/j exceeds n.

%F The next term is approximately the previous term * e^3.

%t s = 0; k = 2; Do[ While[s = N[s + 1/k, 24]; s <= n, k += 3]; Print[k]; k += 3, {n, 1, 7}]

%Y Cf. A002387, A056053, A056054, A091462, A091463.

%K nonn,more

%O 1,1

%A _Robert G. Wilson v_, Jan 12 2004

%E a(8)-a(9) from _Hugo Pfoertner_, Dec 26 2019

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Last modified August 3 10:11 EDT 2024. Contains 374885 sequences. (Running on oeis4.)