A201921 Automorphic numbers: n^2 ends with n in base 15 (written in base 10).

0, 1, 6, 10, 100, 126, 1000, 2376, 4375, 46251, 156250, 603126, 3640626, 7750000, 19140625, 151718751, 835156251, 1727734375, 5960937501, 32482421875, 236621093751, 340029296875, 8413134765625, 60784912109376, 68961425781250, 709516601562501, 1236678466796875

Offset: 1

Author

Martin Renner, Dec 06 2011

Keywords

• nonn
• base

Examples

			a(3) = 6 = (6)_15 since 6^2 = 36 = (26)_15 ends with 6 in base 15.
a(4) = 10 = (A)_15 since 10^2 = 100 = (6A)_15 ends with A in base 15.
a(5) = 100 = (6A)_15 since 100^2 = 10000 = (2E6A)_15 ends with 6A in base 15.
		

Links

• Eric M. Schmidt, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A003226, A201821, A201918, A201919, A201948, A237583.

Programs

Sage

# See A003226. - Eric M. Schmidt, Feb 09 2014

Extensions

More terms from Eric M. Schmidt, Feb 09 2014