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A091523
Graham-Pollak sequence with initial term 8.
5
8, 12, 17, 24, 34, 48, 68, 96, 136, 193, 273, 386, 546, 772, 1092, 1545, 2185, 3090, 4370, 6180, 8740, 12360, 17480, 24721, 34961, 49443, 69923, 98886, 139846, 197772, 279692, 395544, 559384, 791089, 1118769, 1582179, 2237539, 3164358
OFFSET
1,1
COMMENTS
For n>=3, a(n) = sqrt(2*a(n-1)^2 + (-2)^(n-3)), with a(2) = 12. Unlike the Graham-Pollack formula given in A001521, this formula does not use the floor function. - Richard R. Forberg, Aug 20 2013
LINKS
Th. Stoll, On Families of Nonlinear Recurrences Related to Digits, Journal of Integer Sequences, Vol. 8 (2005), Article 05.3.2.
Eric Weisstein's World of Mathematics, Graham-Pollak Sequence
FORMULA
See A001521.
CROSSREFS
Sequence in context: A331863 A175975 A030752 * A257162 A352880 A104201
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Jan 18 2004
STATUS
approved