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A276705 Records in A249860. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 24 22:03 EDT 2019. Contains 322446 sequences. (Running on oeis4.)