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

0,2

Links

Table of n, a(n) for n=0..24.

Formula

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

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

Crossrefs

Sequence in context: A318548 A318210 A080881 * A303294 A302566 A333702

Adjacent sequences: A138295 A138296 A138297 * A138299 A138300 A138301

Keyword

nonn

Author

Paul Curtz, May 07 2008

Extensions

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

Status

approved