A276706 Indices of records in A249860.

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

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 * A357018 A271396 A070110

Adjacent sequences: A276703 A276704 A276705 * A276707 A276708 A276709

Keyword

nonn

Author

Colin Barker, Sep 15 2016

Status

approved