A068834 Square such that the next three squares also having a square digit sum.

81, 100, 121, 144, 400, 10000, 10201, 10404, 12100, 40000, 1000000, 1002001, 1004004, 1020100, 1172889, 1210000, 1232100, 2604996, 4000000, 4297329, 4485924, 6185169, 11048976, 11108889, 12916836, 14584761, 16353936, 23040000

Offset: 1

Author

Amarnath Murthy, Mar 09 2002

Keywords

• base
• hard
• nonn

Examples

			a(7) = 81 as the sum of the digits of 7 consecutive squares 81,100,121,144,169,196 and 225 is a square.
		

Crossrefs

Cf. A068833.

Extensions

More terms from Sascha Kurz, Mar 26 2002