A073218 The terms of A055258 (sums of two powers of 7) divided by 2.

1, 4, 7, 25, 28, 49, 172, 175, 196, 343, 1201, 1204, 1225, 1372, 2401, 8404, 8407, 8428, 8575, 9604, 16807, 58825, 58828, 58849, 58996, 60025, 67228, 117649, 411772, 411775, 411796, 411943, 412972, 420175, 470596, 823543

Offset: 0

Author

Jeremy Gardiner, Jul 21 2002

Keywords

• nonn
• tabl
• easy

Examples

			T(2,0) = 25 = (7^2+7^0) / 2.
		

Crossrefs

Cf. A055258.

Formula

T(n,m) = (7^n + 7^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.

Extensions

Offset changed by Alois P. Heinz, Apr 08 2025