A299073 Indices of records in A243145.

1, 3, 5, 19, 21, 41, 59, 173, 241, 269, 326, 341, 431, 491, 4406, 6641, 10946, 45386, 54206, 81611, 94706, 362351, 486281, 1099766, 1197026, 1220126, 1439756, 1597361, 1685276, 2000246, 2405051, 6550946, 9996731, 15410111, 34120511, 39283856, 41437226, 47108981

Offset

1,2

Links

Chai Wah Wu, Table of n, a(n) for n = 1..51

Maple

f:= proc(n) local k;
  for k from (n mod 2)+1 by 2 do
    if isprime(n+k) and isprime(n+k^2) then return k fi
  od
end proc:
f(1):= 1:
vmax:= 0: recinds:= NULL:
for n from 1 to 10^7 do
    v:= f(n);
  if v > vmax then
     vmax:= v; recinds:= recinds, n;
    fi
od:
recinds;

Crossrefs

Cf. A243145, A299112.

Sequence in context: A242961 A025046 A305700 * A329797 A180931 A118484

Adjacent sequences: A299070 A299071 A299072 * A299074 A299075 A299076

Keyword

nonn,more

Author

Robert Israel, Feb 02 2018

Extensions

a(34)-a(38) from Chai Wah Wu, Sep 10 2019

Status

approved