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A265822 If n is 0, 1, or prime, a(n) = n; else a(n) = a(n-1) + a(n-2). 0
0, 1, 2, 3, 5, 5, 10, 7, 17, 24, 41, 11, 52, 13, 65, 78, 143, 17, 160, 19, 179, 198, 377, 23, 400, 423, 823, 1246, 2069, 29, 2098, 31, 2129, 2160, 4289, 6449, 10738, 37, 10775, 10812, 21587, 41, 21628, 43, 21671, 21714, 43385, 47, 43432, 43479, 86911, 130390, 217301, 53, 217354, 217407, 434761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..56.

FORMULA

See the name.

EXAMPLE

a(9) = a(8) + a(7)

     = a(7) + a(6) + 7

     = a(5) + a(4) + 14

     = a(3) + a(2) + 19

     = 24

MATHEMATICA

a[0] = 0; a[1] = 1; a[n_] := a[n] = If[PrimeQ@ n, n, a[n - 1] + a[n - 2]]; Table[a@ n, {n, 0, 56}] (* Michael De Vlieger, Dec 15 2015 *)

CROSSREFS

Sequence in context: A237365 A322770 A257008 * A257012 A325412 A265562

Adjacent sequences:  A265819 A265820 A265821 * A265823 A265824 A265825

KEYWORD

nonn,easy

AUTHOR

Nicholas Drozd, Dec 15 2015

EXTENSIONS

More terms from Michael De Vlieger, Dec 15 2015

STATUS

approved

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Last modified September 17 06:52 EDT 2019. Contains 327119 sequences. (Running on oeis4.)