A138795 a(n) = (A138793(n+1)-A138793(n))/10^n.

2, 3, 4, 5, 6, 7, 8, 9, 1, 110, 2100, 31000, 410000, 5100000, 61000000, 710000000, 8100000000, 91000000000, 20000000000, 1200000000000, 22000000000000, 320000000000000, 4200000000000000, 52000000000000000, 620000000000000000

Offset

1,1

Comments

First differences of A138793 divided by 10^n

Links

Table of n, a(n) for n=1..25.

Formula

a(n) = A138793(n+1)-A138793(n)

Mathematica

b = {}; a = {}; Do[w = RealDigits[n]; w = First[w]; Do[AppendTo[a, w[[k]]], {k, 1, Length[w]}]; p = FromDigits[Reverse[a]]; AppendTo[b, p], {n, 1, 61}]; c = {}; Do[AppendTo[c, (b[[n + 1]] - b[[n]])/(10^n)], {n, 1, Length[b] - 1}]; c (*Artur Jasinski*)

Crossrefs

Cf. A000422, A116504, A007908, A116505, A104759, A138789, A138790, A138793, A075019, A075020, A075021, A075022, A138794.

Sequence in context: A061816 A083960 A344486 * A297233 A177895 A340184

Adjacent sequences: A138792 A138793 A138794 * A138796 A138797 A138798

Keyword

base,nonn

Author

Artur Jasinski, Mar 30 2008

Status

approved