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.

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

Links

Table of n, a(n) for n=1..38.

Crossrefs

Sequence in context: A222025 A222026 A293672 * A173173 A303025 A346020

Adjacent sequences: A050190 A050191 A050192 * A050194 A050195 A050196

Keyword

nonn

Author

Clark Kimberling

Status

approved