A182561 Position of first occurrence of n in A182535.

1, 4, 7, 16, 45, 74, 166, 529, 866, 1993, 4560, 9907, 27425, 62894, 161134, 386007, 1308165, 2363223, 7190239, 17844411, 54259731, 90564740, 308061971, 487568736, 1422102892, 3573737940, 8516241133, 22686128280, 77770540116, 144783290133, 365331892456, 928427248701, 2354811032695

Offset

1,2

Links

Table of n, a(n) for n=1..33.

Example

First occurrence of 4 in A182535 has index 16, so a(4)=16.

Prog

(PARI) { a(n) = my(k, p, t); k=n-1; while(1, k++; p=[]; forvec(v=vector(n-1, i, [1, k-1]), t = fibonacci(n+k) + sum(i=1, n-1, fibonacci(v[i]+i));  if(ispseudoprime(t), p=concat(p, [t])); , 2); if(p, return(primepi(vecmin(p)))); ); } /* Max Alekseyev, Jan 31 2014 */

Crossrefs

Sequence in context: A132334 A289521 A097661 * A246915 A340600 A013625

Adjacent sequences: A182558 A182559 A182560 * A182562 A182563 A182564

Keyword

nonn

Author

Alex Ratushnyak, May 05 2012

Extensions

Corrected and extended by Max Alekseyev, Jan 31 2014

Status

approved