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A287895
Differences of A287894.
1
4, 13, 12, 3, 61, 42, 50, 39, 43, 80, 65, 89, 180, 110, 146, 160, 156, 187, 88, 118, 258, 243, 244, 282, 287, 189, 343, 311, 203, 410, 219, 467, 473, 274, 384, 535, 406, 484, 54, 825, 310, 558, 551, 375, 886, 659, 539, 515, 294, 914, 764, 478, 774, 757, 823
OFFSET
1,1
COMMENTS
The first two negative terms are a(99) = -239 and a(999) = -5966. - Giovanni Resta, Jun 07 2017
LINKS
EXAMPLE
Take the differences of 1,5,18,30,... => 4,13,12,...
MAPLE
ds:= n -> convert(convert(n, base, 10), `+`):
f:= n -> add(ds(k^n), k=1..n):
A287894:= map(f, [$1..101]);
A287894[2..101] - A287894[1..100]; # Robert Israel, Jun 30 2017
MATHEMATICA
s[n_] := Sum[Total@IntegerDigits[k^n], {k, n}]; Differences@ Array[s, 60] (* Giovanni Resta, Jun 07 2017 *)
CROSSREFS
Cf. A287894.
Sequence in context: A175174 A369412 A136137 * A050223 A301792 A344512
KEYWORD
sign,base
AUTHOR
Marian Kraus, Jun 02 2017
STATUS
approved