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 A326740 Numbers which converge to 7 under repeated application of the powertrain map of A133500. 10
 7, 71, 75, 107, 117, 127, 137, 147, 157, 167, 177, 187, 197, 207, 307, 407, 507, 523, 543, 607, 707, 711, 723, 747, 751, 807, 907, 1071, 1075, 1171, 1175, 1271, 1275, 1371, 1375, 1471, 1475, 1571, 1575, 1671, 1675, 1771, 1775, 1871, 1875, 1971, 1975, 2071 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 75 -> 7^5 = 16807 -> 1^6*8^0*7 = 7. CROSSREFS Cf. A133500, A133501, A135384, A135385, A309385, A326733, A326734, A326735, A326736, A326737, A326738, A326739, A326741, A326742. Sequence in context: A111462 A045713 A090155 * A107163 A179784 A142037 Adjacent sequences:  A326737 A326738 A326739 * A326741 A326742 A326743 KEYWORD nonn,base,easy AUTHOR Martin Renner, Jul 22 2019 STATUS approved

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Last modified November 29 10:31 EST 2021. Contains 349416 sequences. (Running on oeis4.)