A026407 a(n) = greatest k such that s(j) > 0 for all j < k at end of stage n in forming A026409.

1, 2, 4, 6, 7, 10, 12, 15, 19, 23, 28, 31, 36, 37, 45, 49, 58, 60, 67, 75, 77, 90, 91, 104, 110, 111, 125, 135, 145, 158, 160, 163, 186, 202, 203, 218, 219, 236, 254, 256, 274, 283, 303, 322, 325, 353, 358, 359, 390, 405, 407, 448, 450, 477, 492, 494, 498, 543, 544, 547, 587, 589

Offset

1,2

Links

Table of n, a(n) for n=1..62.

Crossrefs

Cf. A026409.

Sequence in context: A189030 A198033 A071260 * A003035 A094453 A191200

Adjacent sequences: A026404 A026405 A026406 * A026408 A026409 A026410

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Sep 26 2019

Status

approved