A022429 - OEIS

A022429

a(n) = c(n-1) + c(n-3) where c is the sequence of numbers not in a.

1, 2, 5, 9, 11, 14, 17, 20, 23, 27, 29, 33, 35, 39, 41, 45, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 99, 101, 105, 107, 111, 113, 117, 119, 123, 125, 129, 131, 135, 137

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OFFSET

0,2

LINKS

Ivan Neretin, Table of n, a(n) for n = 0..10000

MATHEMATICA

Fold[Append[#1, Plus @@ Complement[Range[Max@#1 + 3], #1][[{#2, #2 + 2}]]] &, {1, 2, 5}, Range[43]] (* Ivan Neretin, Mar 29 2017 *)

CROSSREFS

Cf. A022424 and references therein.

Sequence in context: A242936 A080154 A069829 * A020907 A206904 A189472

Adjacent sequences: A022426 A022427 A022428 * A022430 A022431 A022432

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Missing term a(20) = 59 added by Ivan Neretin, Mar 29 2017

STATUS

approved