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A199638 Last number in row n of triangle A199636. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 18 07:25 EDT 2021. Contains 345098 sequences. (Running on oeis4.)