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A050193
a(n)=a(n-1)+a(n-2)-d, where d=a(n/3) if 3 divides n, else d=0; 2 initial terms.
0
1, 1, 1, 2, 3, 4, 7, 11, 17, 28, 45, 71, 116, 187, 300, 487, 787, 1270, 2057, 3327, 5377, 8704, 14081, 22774, 36855, 59629, 96467, 156096, 252563, 408631, 661194, 1069825, 1730974, 2800799, 4531773, 7332501, 11864274, 19196775
OFFSET
1,4
CROSSREFS
Sequence in context: A222025 A222026 A293672 * A173173 A303025 A346020
KEYWORD
nonn
STATUS
approved