A067493 Powers of 7 with initial digit 1.

1, 16807, 117649, 1977326743, 13841287201, 1628413597910449, 11398895185373143, 191581231380566414401, 1341068619663964900807, 157775382034845806615042743, 1104427674243920646305299201

Offset

1,2

Links

Muniru A Asiru, Table of n, a(n) for n = 1..357

Prog

(GAP) Filtered(List([0..40], n->7^n), i->ListOfDigits(i)[1]=1); # Muniru A Asiru, Oct 22 2018

Crossrefs

Cf. A067480, A067481, A067482, A067483, A067484, A067485, A067486, A067487, A067488, A067489, A067490, A067491, A067492.

Sequence in context: A227600 A147698 A208630 * A016925 A265472 A016985

Adjacent sequences: A067490 A067491 A067492 * A067494 A067495 A067496

Keyword

base,easy,nonn

Author

Amarnath Murthy, Feb 09 2002

Extensions

Offset 1 by Michel Marcus, Oct 19 2018

Status

approved