A138298 First differences of A137976 after having added two leading ones.

0, 2, 10, 21, 110, 233, 1220, 2584, 13530, 28657, 150050, 317811, 1664080, 3524578, 18454930, 39088169, 204668310, 433494437, 2269806340, 4807526976, 25172538050, 53316291173, 279167724890, 591286729879, 3096017511840

Offset: 0

Author

Paul Curtz, May 07 2008

Keywords

• nonn

Formula

a(n)= A137986(n)-A137986(n-1), n>=2.

a(2n)= 2*A102312(n)= 10*A049666(n). a(2n+1)= A134490(n).

Extensions

Edited and extended by R. J. Mathar, Jul 28 2008