A338073 Rearrangement of positive integers except 3 defined by A083758.

1, 2, 5, 4, 13, 11, 7, 38, 9, 22, 45, 53, 10, 12, 17, 44, 49, 50, 52, 85, 158, 68, 55, 229, 97, 8, 62, 269, 256, 159, 41, 73, 54, 179, 581, 210, 98, 297, 86, 34, 43, 273, 199, 122, 16, 153, 140, 29, 709, 521, 64, 163, 87, 389, 1145, 106, 164, 231, 26, 177, 28, 464, 51, 258, 398, 391

Offset

1,2

Comments

This is conjectured to be a permutation of all positive integers except 3.

Apply PrimePi (A000720) to the terms of A083758.

Links

Table of n, a(n) for n=1..66.

Prog

(PARI) a338073(m)={my(np=1000*m, pused=vectorsmall(np), digp=[]); for(n=1, m, my(found=0); for(k=1, np, if(!pused[k], my(add=digits(prime(k)), pc=concat(digp, add)); if(ispseudoprime(fromdigits(pc)), print1(k, ", "); digp=pc; pused[k]=1; found=1; break))); if(!found, break))};
a338073(66) \\ Hugo Pfoertner, Oct 21 2020

Crossrefs

Cf. A000720, A083758, A083759, A338072.

Sequence in context: A073122 A277020 A084410 * A080067 A117824 A122212

Adjacent sequences: A338070 A338071 A338072 * A338074 A338075 A338076

Keyword

nonn

Author

N. J. A. Sloane, Oct 20 2020

Status

approved