A134744 - OEIS

A134744

First differences of A084663.

2, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 13, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 29, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 59, 3, 1, 1, 7, 1, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

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OFFSET

1,1

REFERENCES

Eric S. Rowland, A simple prime-generating recurrence, Abstracts Amer. Math. Soc., 29 (No. 1, 2008), p. 50 (Abstract 1035-11-986).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Eric S. Rowland, A simple prime-generating recurrence, arXiv:0710.3217 [math.NT], 2007-2008.

MATHEMATICA

b[1] = 8; b[n_] := b[n] = b[n-1] + GCD[n, b[n-1]];

Table[b[n], {n, 105}] // Differences (* Jean-François Alcover, Sep 28 2018 *)

PROG