cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A342711 Partial sums of A000267.

Original entry on oeis.org

1, 3, 6, 9, 13, 17, 22, 27, 32, 38, 44, 50, 57, 64, 71, 78, 86, 94, 102, 110, 119, 128, 137, 146, 155, 165, 175, 185, 195, 205, 216, 227, 238, 249, 260, 271, 283, 295, 307, 319, 331, 343, 356, 369, 382, 395, 408, 421, 434, 448, 462, 476, 490, 504, 518, 532, 547
Offset: 0

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Author

Slav E. Angelov, Mar 19 2021

Keywords

Comments

a(n) = A109512(n+1) for n = 0..23.
This sequence is the partial sums of A000267, which in turn is the partial sums of A240025.
It can be used to obtain a formula for the n-th term of A342712.

Crossrefs

Cf. A000267, A240025, A342712.

Programs

  • Mathematica
    Accumulate @ Array[Floor @ Sqrt[4*# + 1] &, 100, 0] (* Amiram Eldar, Mar 19 2021 *)
  • PARI
    a(n) = sum(i=0, n, sqrtint(4*i+1)); \\ Michel Marcus, Mar 19 2021
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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