A144295 Where records occur in A144294.

1, 2, 4, 12, 82, 231, 380, 2990, 20954, 40953, 42852, 182492, 859647, 8039644, 11990003, 78269808, 3263358159, 6941215856

Offset

1,2

Links

Table of n, a(n) for n=1..18.

Prog

(PARI) f(n)=my(k=n+(sqrtint(4*n)+1)\2); forprime(p=2, , if(!issquare(Mod(k, p)), return(p))); \\ A144294
lista(nn) = {my(v=vector(nn, n, f(n))); my(m=0, nm=0); for (n=1, nn, nm = v[n]; if (nm > m, print1(n, ", "); m = nm; ); ); } \\ Michel Marcus, Jun 25 2021

Crossrefs

Cf. A144294, A144296.

Sequence in context: A003180 A002080 A001206 * A119489 A353743 A217757

Adjacent sequences: A144292 A144293 A144294 * A144296 A144297 A144298

Keyword

nonn,more

Author

N. J. A. Sloane, Dec 03 2008

Extensions

a(9)-a(12) from R. J. Mathar, Dec 04 2008

a(13)-a(15) from Michel Marcus, Jun 25 2021

a(16)-a(18) from Michael S. Branicky, Sep 30 2024

Status

approved