A138787 - OEIS

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A138787

First differences of A007878.

4

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

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..13.

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

STATUS

approved