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Numerators of the continued fraction convergents which have the least possible prime denominators (A072999).
3

%I #8 Jul 14 2024 18:01:10

%S 1,1,2,5,12,53,330,2693,11102,69305,2644692,26516225,373871842,

%T 6008465697,36424666024,78857797745,982718238964,23664095532881,

%U 2367392271527064,85249785870507185,6310851546689058754

%N Numerators of the continued fraction convergents which have the least possible prime denominators (A072999).

%C The n-th convergent is A083699(n)/A072999(n).

%F a(1)=1, a(2)=1, a(n) = A083698(n)*a(n-1) + a(n-2) for n>2.

%Y Cf. A072999 (prime denominators), A083698 (partial quotients), A083700 (decimal expansion).

%K frac,nonn

%O 1,3

%A _Paul D. Hanna_, May 03 2003