A138787 First differences of A007878.

1, 3, 11, 43, 187, 857, 4144, 20812, 107822, 572918, 3108512, 17164308, 96199106, 546137465, 3135381256, 18177991951

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Formula

a(n) = A007878(n+1)-A007878(n).

Crossrefs

Cf. A007878, A138788.

Sequence in context: A049180 A049152 A151104 * A110052 A300626 A126282

Adjacent sequences: A138784 A138785 A138786 * A138788 A138789 A138790

Keyword

nonn,more

Author

Artur Jasinski, Mar 30 2008

Extensions

a(9)-a(11) from Vaclav Kotesovec, Mar 29 2019

a(12)-a(13) from Seiichi Manyama, Nov 08 2023

a(14)-a(16) from the data at A007878 added by Amiram Eldar, Oct 24 2024

Status

approved