A280380 - OEIS

A280380

First occurrence of A280379(k) = n.

1, 2, 30, 46, 374, 2146, 5945, 14855, 24702

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OFFSET

0,2

COMMENTS

n < log(a(n)) for a(n) < 1.1*10^6.

LINKS

EXAMPLE

For prime(30)=113, A056171(113) = 14, A104272(12)=107 and A104272(13) = 127, so 14 - 12 = 2 (First occurrence).

PROG

(PARI) \\RR[x] is a list of Ramanujan primes, A104272.

{plimit=1.1*10^6; i=n=s=0;

forprime(p=2, plimit,

s++;

if(p==RR[n+1], n++);

if(i==s-primepi(floor(p/2))-n, print(i, " ", s); i++)

)

}

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved