A291803 Partial sums of A230625.

1, 3, 6, 16, 21, 32, 39, 50, 64, 85, 96, 139, 152, 175, 204, 224, 241, 287, 306, 391, 422, 465, 488, 535, 557, 602, 617, 704, 733, 826, 857, 878, 937, 1018, 1065, 1239, 1276, 1359, 1420, 1513, 1554, 1649, 1692, 1863, 1980, 2067, 2114, 2197, 2227, 2313, 2426

Offset: 1

Author

N. J. A. Sloane, Sep 06 2017

Keywords

• nonn

Comments

Although A230625 is a very irregular function, here the graph is much smoother, and it appears that a(n) approx= 1.2*n^2. It would be nice to have a more precise estimate.

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A080670, A287881, A287882, A287874, A230625.

Programs

Mathematica

A230625 = Cases[Import["https://oeis.org/A230625/b230625.txt", "Table"], {, }][[All, 2]];
Accumulate[A230625] (* Robert Price, Mar 16 2020 *)