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 A182557 a(n) = a(n-1)*2 + floor(sqrt(a(n-2))). 2
 0, 1, 2, 5, 11, 24, 51, 106, 219, 448, 910, 1841, 3712, 7466, 14992, 30070, 60262, 120697, 241639, 483625, 967741, 1936177, 3873337, 7748065, 15498098, 30998979, 62001894, 124009355, 248026584, 496064303, 992144354, 1984310980, 3968653458, 7937351461, 15874765919 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(0)=0, a(1)=1, a(n) = a(n-1)*2 + floor(sqrt(a(n-2))). PROG (Python) import math prpr = 0 prev = 1 for n in range(55): .  current = prev*2 + int(math.sqrt(prpr)) .  print prpr, .  prpr = prev .  prev = current CROSSREFS Cf. A076677, A076678. Sequence in context: A300277 A294378 A090764 * A027934 A134389 A286945 Adjacent sequences:  A182554 A182555 A182556 * A182558 A182559 A182560 KEYWORD nonn AUTHOR Alex Ratushnyak, May 05 2012 STATUS approved

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Last modified October 24 01:20 EDT 2018. Contains 316541 sequences. (Running on oeis4.)