A210251 Residues modulo 100 of odd squares.

1, 9, 21, 25, 29, 41, 49, 61, 69, 81, 89

Offset: 1

Author

M. F. Hasler, Mar 19 2012

Keywords

• nonn
• base
• fini
• full

Crossrefs

Range of A016754. Odd terms from A010461. See also A002015, A008959, A174452.

Also the range of A030156 and A192775 without initial term.

Programs

Mathematica

Mod[#,100]&/@(Range[1,55,2]^2)//Union (* Harvey P. Dale, Jul 27 2017 *)

PARI

vecsort(vector(12,n,(2*n-1)^2)%100,,8)

Formula

{1,9} + {0,1,2,3,4}*20 union {25}.