A073217 The terms of A055237 (sums of two powers of 5) divided by 2.

1, 3, 5, 13, 15, 25, 63, 65, 75, 125, 313, 315, 325, 375, 625, 1563, 1565, 1575, 1625, 1875, 3125, 7813, 7815, 7825, 7875, 8125, 9375, 15625, 39063, 39065, 39075, 39125, 39375, 40625, 46875, 78125

Offset: 1

Author

Jeremy Gardiner, Jul 21 2002

Keywords

• easy
• nonn

Examples

			a(4) = 13 = (5^2+5^0) / 2
		

Crossrefs

Cf. A055237.

Formula

(5^n + 5^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.