A199638 Last number in row n of triangle A199636.

5, 3, 21, 13, 85, 53, 341, 227, 1365, 909, 5461, 3637, 21845, 14563, 87381, 58253, 349525, 233013, 1398101, 932067, 5592405, 3728269, 22369621, 14913077, 89478485, 59652323, 357913941, 238609293, 1431655765, 954437173, 5726623061, 3817748707, 22906492245

Offset

4,1

Comments

This sequence appears to satisfy a(n) = 4*a(n-2) + a(n-6) - 4*a(n-8). It also appears that a(2n) = A002450(n).

Links

Table of n, a(n) for n=4..36.

Crossrefs

Sequence in context: A199636 A324038 A221473 * A296356 A154825 A091593

Adjacent sequences: A199635 A199636 A199637 * A199639 A199640 A199641

Keyword

nonn

Author

T. D. Noe, Nov 14 2011

Status

approved