A276705 Records in A249860.

4, 5, 7, 8, 9, 20, 55, 91, 187, 247, 391, 475, 667, 775, 1015, 1147, 1435, 1591, 1927, 2107, 2491, 2695, 3127, 3355, 3835, 4087, 4615, 4891, 5467, 5767, 6391, 6715, 7387, 7735, 8455, 8827, 9595, 9991, 10807, 11227, 12091, 12535, 13447, 13915, 14875, 15367

Offset

1,1

Comments

The indices corresponding to the records are in A276706.

Links

Table of n, a(n) for n=1..46.

Formula

Conjectures: (Start)

a(n) = (347+27*(-1)^n)/2 - 3*(27+(-1)^n)*n + 9*n^2 for n>6.

a(n) = a(n-1)+2*a(n-2)-2*a(n-3)-a(n-4)+a(n-5) for n>11.

G.f.: x*(4+x-6*x^2-x^3+x^4+10*x^5+35*x^6+15*x^7+27*x^8-x^9-13*x^10) / ((1-x)^3*(1+x)^2).

(End)

Prog

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

Crossrefs

Cf. A249860, A276704, A276706.

Sequence in context: A080712 A005048 A119642 * A168044 A248188 A174047

Adjacent sequences: A276702 A276703 A276704 * A276706 A276707 A276708

Keyword

nonn

Author

Colin Barker, Sep 15 2016

Status

approved