A320862 Powers of 2 with initial digit 6.

64, 65536, 67108864, 68719476736, 604462909807314587353088, 618970019642690137449562112, 633825300114114700748351602688, 649037107316853453566312041152512, 664613997892457936451903530140172288, 680564733841876926926749214863536422912

Offset

1,1

Links

Muniru A Asiru, Table of n, a(n) for n = 1..220

Index to divisibility sequences

Maple

select(x->"6"=""||x[1], [2^n$n=0..180])[];

Mathematica

Select[2^Range[160], First[IntegerDigits[#]] == 6 &] (* G. C. Greubel, Oct 27 2018 *)

Prog

(GAP) Filtered(List([0..180], n->2^n), i->ListOfDigits(i)[1]=6);
(PARI) select(x->(digits(x)[1]==6), vector(200, n, 2^n)) \\ Michel Marcus, Oct 26 2018
(Magma) [2^n: n in [1..160] | Intseq(2^n)[#Intseq(2^n)] eq 6]; // G. C. Greubel, Oct 27 2018

Crossrefs

Cf. A000079 (powers of 2), A008952 (leading digit of 2^n), A217399 (numbers starting with 6).

Powers of 2 with initial digit k, (k = 1..6): A067488, A067480, A320859, A320860, A320861, this sequence.

Sequence in context: A227604 A159677 A013832 * A034989 A187242 A159410

Adjacent sequences: A320859 A320860 A320861 * A320863 A320864 A320865

Keyword

base,nonn

Author

Muniru A Asiru, Oct 23 2018

Status

approved