A025704 - OEIS

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A025704

Index of 4^n within sequence of numbers of form 4^i*7^j.

0

1, 2, 4, 7, 10, 14, 19, 24, 30, 37, 45, 53, 62, 72, 82, 93, 105, 118, 131, 145, 160, 175, 191, 208, 226, 244, 263, 283, 303, 324, 346, 369, 392, 416, 441, 466, 492, 519, 547, 575, 604, 634, 664, 695, 727, 760, 793, 827, 862, 897, 933, 970, 1008, 1046, 1085, 1125, 1165

(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: A025711 A117634 A022776 * A025710 A023536 A196126

Adjacent sequences: A025701 A025702 A025703 * A025705 A025706 A025707

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved