A025727 Index of 7^n within sequence of numbers of form 7^i*10^j.

1, 2, 4, 7, 11, 16, 22, 28, 35, 43, 52, 62, 73, 84, 96, 109, 123, 138, 154, 171, 188, 206, 225, 245, 266, 288, 310, 333, 357, 382, 408, 435, 463, 491, 520, 550, 581, 613, 646, 679, 713, 748, 784, 821, 859, 898, 937, 977, 1018, 1060, 1103, 1147, 1191, 1236, 1282, 1329

Offset

1,2

Links

Table of n, a(n) for n=1..56.

Crossrefs

Sequence in context: A296202 A126613 A024224 * A319159 A025702 A025717

Adjacent sequences: A025724 A025725 A025726 * A025728 A025729 A025730

Keyword

nonn

Author

David W. Wilson

Status

approved