A262464 Indices of rows of triangle A262432 where the maximum term of the row is a new record.

1, 6, 15, 30, 60, 90, 140, 264, 308, 440, 528, 760, 870, 1305, 1740, 2436, 2610, 3480, 4060, 5220, 6786, 6960, 7830, 12180, 13806, 14160, 15930, 19488, 24030, 28320, 29264, 34515, 35400, 39648, 50976, 55224, 63720, 66080, 69030, 74340, 87792, 96642, 115104, 122080, 127530, 143880

Offset

1,2

Links

Michel Marcus, Table of n, a(n) for n = 1..127

Example

After row 1 which is [1], the next maximum 2 occurs at row 6 which is [2, 1, 1, 1, 1, 0].

Prog

(PARI) lista(nn) = {m = 0; vc = vector(nn); for (n=1, nn, d = denominator(sigma(n, -1)); vc[d]++; if (vc[d] > m, print1(n, ", "); m = vc[d]); ); }

Crossrefs

Cf. A262432.

Sequence in context: A331073 A011886 A212251 * A353695 A232169 A231814

Adjacent sequences: A262461 A262462 A262463 * A262465 A262466 A262467

Keyword

nonn

Author

Michel Marcus, Sep 23 2015

Status

approved