A054796 Numbers of form 17+n^2+n or 17+2*n^2.

17, 19, 23, 25, 29, 35, 37, 47, 49, 59, 67, 73, 89, 107, 115, 127, 145, 149, 173, 179, 199, 217, 227, 257, 259, 289, 305, 323, 355, 359, 397, 409, 437, 467, 479, 523, 529, 569, 595, 617, 665, 667, 719, 739, 773, 817, 829, 887, 899, 947, 985, 1009, 1073

Offset: 1

Author

Stuart M. Ellerstein (ellerstein(AT)aol.com), Apr 27 2000

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

A052293.

Programs

Mathematica

Module[{upto=410000},Select[Flatten[Table[{17+n^2+n,17+2n^2},{n,0, Ceiling[ (Sqrt[4*upto-67]-1)/2]}]]//Union,#<=upto&]] (* Harvey P. Dale, Oct 22 2016 *)

Extensions

More terms from James Sellers, Apr 28 2000