A134688 Successive digits of the terms of A000203, the sum-of-divisors function.

1, 3, 4, 7, 6, 1, 2, 8, 1, 5, 1, 3, 1, 8, 1, 2, 2, 8, 1, 4, 2, 4, 2, 4, 3, 1, 1, 8, 3, 9, 2, 0, 4, 2, 3, 2, 3, 6, 2, 4, 6, 0, 3, 1, 4, 2, 4, 0, 5, 6, 3, 0, 7, 2, 3, 2, 6, 3, 4, 8, 5, 4, 4, 8, 9, 1, 3, 8, 6, 0, 5, 6, 9, 0, 4, 2, 9, 6

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Paul Pollack, Joseph Vandehey, Besicovitch, Bisection, and the normality of 0.(1)(4)(9)(16)(25)..., arXiv:1405.6266 [math.NT], 2014.

Paul Pollack, Joseph Vandehey, Besicovitch, Bisection, and the Normality of 0.(1)(4)(9)(16)(25)..., The American Mathematical Monthly 122.8 (2015): 757-765.

Paul Pollack, Joseph Vandehey, Some normal numbers generated by arithmetic functions, arXiv:1309.7386 [math.NT], 2013.

Maple

map(t -> op(ListTools[Reverse](convert(numtheory:-sigma(t), base, 10))), [$1..100]); # Robert Israel, Nov 27 2015

Mathematica

Flatten@ Map[IntegerDigits, Array[DivisorSigma[1, #] &, {42}]] (* Michael De Vlieger, Nov 28 2015 *)
Flatten[IntegerDigits/@DivisorSigma[1, Range[60]]] (* Harvey P. Dale, Apr 06 2018 *)

Crossrefs

Cf. A000203, A077650.

Sequence in context: A082226 A010613 A299693 * A077650 A244669 A316570

Adjacent sequences: A134685 A134686 A134687 * A134689 A134690 A134691

Keyword

base,easy,nonn

Author

Omar E. Pol, Nov 06 2007

Status

approved