A144295 Where records occur in A144294.

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

Offset

1,2

Links

Table of n, a(n) for n=1..15.

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

Status

approved