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A022947 a(n) = a(n-1) + c(n) for n >= 3, a( ) increasing, given a(1)=1 a(2)=3; where c( ) is complement of a( ). 2
1, 3, 8, 14, 21, 30, 40, 51, 63, 76, 91, 107, 124, 142, 161, 181, 203, 226, 250, 275, 301, 328, 356, 385, 416, 448, 481, 515, 550, 586, 623, 661, 700, 741, 783, 826, 870, 915, 961, 1008, 1056, 1105, 1155, 1207, 1260, 1314, 1369, 1425, 1482, 1540 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..10000

MATHEMATICA

Fold[Append[#1, #1[[-1]] + Complement[Range[Max@#1 + 3], #1][[#2]]] &, {1, 3}, Range[3, 50]] (* Ivan Neretin, Apr 05 2016 *)

CROSSREFS

Cf. A005228 and references therein.

Sequence in context: A062550 A219930 A333962 * A098762 A014848 A140479

Adjacent sequences:  A022944 A022945 A022946 * A022948 A022949 A022950

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 4 11:24 EST 2021. Contains 349486 sequences. (Running on oeis4.)