A118762 First differences of A118757.

1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1

Offset

1,10

Comments

a(10^k-1) = 10^k for 0<k<=3, but a(9999)=-1, a(9998)=10000;

abs(a(n)) = 10^k not for all n: e.g. a(1155) = A118757(1156) - A118757(1155) = 1123 - 1121 = 2.

Links

Table of n, a(n) for n=1..99.

Crossrefs

Cf. A118768.

Sequence in context: A307978 A367614 A367616 * A360160 A360159 A284100

Adjacent sequences: A118759 A118760 A118761 * A118763 A118764 A118765

Keyword

sign

Author

Reinhard Zumkeller, May 01 2006

Status

approved