A067482 -id:A067482 - cp's OEIS frontend

A067492 Powers of 6 with initial digit 1.

1, 1296, 1679616, 10077696, 13060694016, 16926659444736, 101559956668416, 131621703842267136, 170581728179578208256, 1023490369077469249536, 1326443518324400147398656, 1719070799748422591028658176

Offset: 1

Amarnath Murthy, Feb 09 2002

Muniru A Asiru, Table of n, a(n) for n = 1..387

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

Filtered(List([0..40],n->6^n),i->ListOfDigits(i)[1]=1); # Muniru A Asiru, Oct 22 2018

Select[6^Range[0,40],IntegerDigits[#][[1]]==1&] (* Harvey P. Dale, Oct 04 2023 *)

Offset 1 from Michel Marcus, Oct 19 2018

A067493 Powers of 7 with initial digit 1.

Original entry on oeis.org

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

Offset: 1

Amarnath Murthy, Feb 09 2002

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

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

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

Offset 1 by Michel Marcus, Oct 19 2018

A067494 Powers of 8 with initial digit 1.

Original entry on oeis.org

1, 16777216, 134217728, 1073741824, 18014398509481984, 144115188075855872, 1152921504606846976, 19342813113834066795298816, 154742504910672534362390528, 1237940039285380274899124224

Offset: 1

Amarnath Murthy, Feb 09 2002

Muniru A Asiru, Table of n, a(n) for n = 1..330

Cf. A067480, A067481, A067482, A067483, A067484, A067485, A067486, A067487, A067488, A067489, A067490, A067491, A067492, A067493.

Filtered(List([0..40],n->8^n),i->ListOfDigits(i)[1]=1); # Muniru A Asiru, Oct 22 2018

Select[8^Range[0,30],IntegerDigits[#][[1]]==1&] (* Harvey P. Dale, Jun 10 2023 *)

Offset 1 by Michel Marcus, Oct 19 2018

A242594 Numbers k such that 4^k has initial digit 4.

Original entry on oeis.org

1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 99, 104, 109, 114, 119, 124, 129, 134, 139, 144, 197, 202, 207, 212, 217, 222, 227, 232, 237, 242, 295, 300, 305, 310, 315, 320, 325, 330, 335, 393, 398, 403, 408, 413, 418, 423, 428, 433, 491, 496, 501, 506, 511, 516, 521, 526, 531, 584, 589, 594, 599, 604, 609, 614, 619

Offset: 1

Robert Israel, May 18 2014

			6 is in the sequence because 4^6 = 4096 starts with 4.

Robert Israel, Table of n, a(n) for n = 1..9693

Cf. A067482.

select(t -> 4^t >= 4*10^ilog10(4^t) and 4^t < 5*10^ilog10(4^t), [$1..1000]); # Robert Israel, May 18 2014

a(n) = log_4(A067482(n)).

A067495 Powers of 9 having initial digit 1.

Original entry on oeis.org

1, 1853020188851841, 16677181699666569, 150094635296999121, 1350851717672992089, 12157665459056928801, 109418989131512359209, 1824800363140073127359051977856583921, 16423203268260658146231467800709255289, 147808829414345923316083210206383297601

Offset: 1

Amarnath Murthy, Feb 09 2002

Muniru A Asiru, Table of n, a(n) for n = 1..250

Cf. A067480, A067481, A067482, A067483, A067484, A067485, A067486, A067487, A067488, A067489, A067490, A067491, A067492, A067493, A067494.

Filtered(List([0..40],n->9^n),i->ListOfDigits(i)[1]=1); # Muniru A Asiru, Oct 22 2018

select(x-> "1"=""||x[1],[9^n$n=0..60])[];  # Alois P. Heinz, Oct 22 2018

Select[9^Range[0,50],First[IntegerDigits[#]]==1&] (* Harvey P. Dale, Oct 01 2015 *)

More terms from Harvey P. Dale, Oct 01 2015

cp's OEIS Frontend

A067492 Powers of 6 with initial digit 1.

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A067493 Powers of 7 with initial digit 1.

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A067494 Powers of 8 with initial digit 1.

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A242594 Numbers k such that 4^k has initial digit 4.

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A067495 Powers of 9 having initial digit 1.

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