A025698 Index of 3^n within sequence of numbers of form 3^i*7^j.

1, 2, 4, 6, 9, 12, 16, 20, 25, 31, 37, 44, 51, 59, 67, 76, 86, 96, 107, 118, 130, 142, 155, 168, 182, 197, 212, 228, 244, 261, 278, 296, 315, 334, 354, 374, 395, 416, 438, 461, 484, 508, 532, 557, 582, 608, 634, 661, 689, 717, 746, 775, 805, 835, 866, 898, 930, 963, 996

Offset

1,2

Links

Table of n, a(n) for n=1..59.

Crossrefs

Sequence in context: A239873 A224811 A024617 * A194211 A224808 A351719

Adjacent sequences: A025695 A025696 A025697 * A025699 A025700 A025701

Keyword

nonn

Author

David W. Wilson

Status

approved