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A073218 The terms of A055258 (sums of two powers of 7) divided by 2. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..36.

FORMULA

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

EXAMPLE

a(4) = 25 = (7^2+7^0) / 2

CROSSREFS

Cf. A055258.

Sequence in context: A143608 A079441 A129418 * A276288 A219700 A151348

Adjacent sequences:  A073215 A073216 A073217 * A073219 A073220 A073221

KEYWORD

easy,nonn

AUTHOR

Jeremy Gardiner, Jul 21 2002

STATUS

approved

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Last modified December 4 13:29 EST 2021. Contains 349526 sequences. (Running on oeis4.)