OFFSET
0,2
COMMENTS
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..81
FORMULA
a(n) is asymptotic to c*2^(n(n+1)/2) where c=1.54241381761010214381886547... - Benoit Cloitre, Jul 01 2004
c = (1 + Sum_{k>=1} (Product_{j=1..k} 1/(2^(j-1)*(2^j-1)))) / A233590 = 1.5424138176101021438188654719396629292944606799275904286064... . - Vaclav Kotesovec, Nov 27 2015
MATHEMATICA
a[0]=1; a[1]=2; a[n_] := (2^n)*a[n-1] + (2^(n-1))*a[n-2]; Table[ a[n], {n, 0, 14}] (* Robert G. Wilson v, Jul 03 2004 *)
RecurrenceTable[{a[0]==1, a[1]==2, a[n]==2^n a[n-1]+2^(n-1) a[n-2]}, a, {n, 20}] (* Harvey P. Dale, Feb 16 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 01 2004
EXTENSIONS
More terms from Benoit Cloitre, Jul 02 2004
STATUS
approved