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A025731 Index of 8^n within sequence of numbers of form 7^i*8^j. 0
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120, 137, 155, 174, 194, 215, 237, 260, 284, 309, 335, 362, 390, 419, 449, 480, 513, 547, 582, 618, 655, 693, 732, 772, 813, 855, 898, 942, 987, 1033, 1081, 1130, 1180, 1231, 1283, 1336, 1390, 1445, 1501, 1558, 1616 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..55.

CROSSREFS

Sequence in context: A025747 A025738 A078256 * A077367 A077366 A077368

Adjacent sequences:  A025728 A025729 A025730 * A025732 A025733 A025734

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified March 20 20:14 EDT 2019. Contains 321352 sequences. (Running on oeis4.)