A088744 a(n) = 3*A088023(n) - 2.

1, 4, 7, 7, 10, 13, 13, 13, 16, 19, 22, 22, 22, 25, 25, 25, 28, 31, 34, 34, 37, 40, 40, 40, 40, 43, 46, 46, 46, 49, 49, 49, 52, 55, 58, 58, 61, 64, 64, 64, 67, 70, 73, 73, 73, 76, 76, 76, 76, 79, 82, 82, 85, 88, 88, 88, 88, 91, 94, 94, 94, 97, 97, 97, 100, 103, 106, 106, 109, 112

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..10000

Mathematica

3*Nest[Join[#, Range[Length[#]] + Reverse[#]] &, {1}, 7] - 2 (* Paolo Xausa, Sep 24 2025 *)

Crossrefs

Cf. A088023.

Sequence in context: A310929 A310930 A131432 * A168074 A061891 A310931

Adjacent sequences: A088741 A088742 A088743 * A088745 A088746 A088747

Keyword

nonn

Author

Gary W. Adamson, Oct 12 2003

Extensions

Edited by Don Reble, Nov 13 2005

a(33) onwards from Andrew Howroyd, Sep 24 2025

Status

approved