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A025711 Index of 5^n within sequence of numbers of form 5^i*10^j. 0
1, 2, 4, 7, 10, 14, 19, 24, 30, 37, 44, 52, 61, 71, 81, 92, 104, 116, 129, 143, 157, 172, 188, 205, 222, 240, 259, 278, 298, 319, 340, 362, 385, 409, 433, 458, 484, 510, 537, 565, 593, 622, 652, 683, 714, 746, 779, 812, 846, 881, 916, 952, 989, 1027, 1065, 1104, 1144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

CROSSREFS

Sequence in context: A047808 A007980 A022339 * A117634 A022776 A025704

Adjacent sequences:  A025708 A025709 A025710 * A025712 A025713 A025714

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 16 06:21 EDT 2019. Contains 327090 sequences. (Running on oeis4.)