A120768 Partial sums of A120405.

1, 2, 3, 5, 6, 8, 11, 19, 20, 22, 25, 33, 38, 50, 71, 135, 136, 138, 141, 149, 154, 166, 187, 251, 260, 280, 313, 409, 474, 642, 957, 1981, 1982, 1984, 1987, 1995, 2000, 2012, 2033, 2097, 2106, 2126, 2159, 2255, 2320, 2488, 2803, 3827, 3844, 3880, 3937, 4097, 4202, 4466, 4949, 6485

Offset

1,2

Links

Harvey P. Dale, Table of n, a(n) for n = 1..2000

Example

a(8) = 19 since A120405(1) through A120405(8) = (1, 1, 1, 2, 1, 2, 3, 8).

Mathematica

Accumulate[Nest[Join[#, # Range[Length[#]]]&, {1, 1}, 6]] (* Harvey P. Dale, Aug 10 2019 *)

Crossrefs

Cf. A120405.

Sequence in context: A098491 A280449 A107947 * A271109 A293033 A370708

Adjacent sequences: A120765 A120766 A120767 * A120769 A120770 A120771

Keyword

nonn

Author

Gary W. Adamson, Jul 03 2006

Extensions

Corrected and extended by N. J. A. Sloane, Aug 09 2019 at the suggestion of Harvey P. Dale.

Status

approved