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A276706 Indices of records in A249860. 1
1, 2, 4, 5, 6, 7, 8, 10, 14, 16, 20, 22, 26, 28, 32, 34, 38, 40, 44, 46, 50, 52, 56, 58, 62, 64, 68, 70, 74, 76, 80, 82, 86, 88, 92, 94, 98, 100, 104, 106, 110, 112, 116, 118, 122, 124, 128, 130, 134, 136, 140, 142, 146, 148, 152, 154, 158, 160, 164, 166 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The records corresponding to the indices are in A276705.

LINKS

Table of n, a(n) for n=1..60.

FORMULA

Conjectures: (Start)

a(n) = a(n-1)+a(n-2)-a(n-3) for n>3.

a(n) = (6*n-27-(-1)^n)/2 for n>6.

G.f.: x*(1+x+x^2-x^4+x^7+3*x^8) / ((1-x)^2*(1+x)).

(End)

PROG

(PARI) lista(nn) = {rec = 0; for (n=1, nn, an = lcm(n-3, n+3); if (an > rec, rec = an; print1(n, ", ")); ); } \\ Michel Marcus, Sep 16 2016

CROSSREFS

Cf. A249860, A276705.

Sequence in context: A047571 A190237 A190225 * A271396 A070110 A049095

Adjacent sequences:  A276703 A276704 A276705 * A276707 A276708 A276709

KEYWORD

nonn

AUTHOR

Colin Barker, Sep 15 2016

STATUS

approved

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Last modified November 17 18:24 EST 2019. Contains 329241 sequences. (Running on oeis4.)