VOOZH about

URL: https://oeis.org/A185810

⇱ A185810 - OEIS

login
A185810
Riordan array ((1+x-sqrt(1-2x-3x^2))/(2x(1-x)),(1+x-sqrt(1-2x-3x^2))).
0
1, 2, 2, 3, 6, 4, 5, 12, 16, 8, 9, 24, 40, 40, 16, 18, 50, 92, 120, 96, 32, 39, 110, 212, 312, 336, 224, 64, 90, 254, 500, 784, 976, 896, 512, 128
OFFSET
0,2
LINKS
Vladimir Kruchinin and D. V. Kruchinin, Composita and their properties, arXiv:1103.2582 [math.CO], 2011-2013.
FORMULA
Riordan array ((1+x-sqrt(1-2x-3x^2))/(2x(1-x)),(1+x-sqrt(1-2x-3x^2))).
EXAMPLE
[1]
[2,2]
[3,6,4]
[5,12,16,8]
[9,24,40,40,16]
[18,50,92,120,96,32]
[39,110,212,312,336,224,64]
[90,254,500,784,976,896,512,128]
CROSSREFS
Sequence in context: A193862 A258631 A254947 * A015050 A284222 A207623
KEYWORD
nonn,tabl
AUTHOR
Vladimir Kruchinin, Feb 05 2011
STATUS
approved