A171614 Numbers n with property that (n^2 + sum of the digits of n^2) is even.

0, 1, 2, 3, 5, 7, 8, 9, 14, 15, 17, 20, 21, 22, 24, 25, 29, 36, 37, 39, 42, 45, 46, 47, 49, 51, 53, 54, 58, 61, 63, 65, 66, 67, 68, 72, 73, 74, 77, 78, 79, 80, 83, 84, 87, 88, 89, 91, 92, 93, 96, 104, 105, 107, 108, 109, 110, 111, 112, 113, 115, 117, 119, 124, 125, 127, 128

Offset

1,3

Comments

Or, n's such that A171613(n) is even.

Links

Table of n, a(n) for n=1..67.

Mathematica

Union@Table[If[EvenQ[n^2+Total[IntegerDigits[n^2]]], n, 0], {n, 0, 200}]
Select[Range[0, 200], EvenQ[#^2+Total[IntegerDigits[#^2]]]&] (* Harvey P. Dale, Apr 01 2019 *)

Crossrefs

Cf. A062028, A171613, A171615.

Sequence in context: A108345 A073629 A125716 * A029601 A290985 A182758

Adjacent sequences: A171611 A171612 A171613 * A171615 A171616 A171617

Keyword

base,nonn

Author

Zak Seidov, Dec 13 2009

Status

approved