A079701 A congruence property: a(n) = (A026375(p)-3)/(2*p) where p is the n-th prime.

2, 7, 87, 1320, 419910, 8176962, 3420949803, 72407225094, 33996105203757, 375381279743363079, 8492278343835565992, 101793365612771357917020, 54550024863167361399570276, 1269806950415965795599217827, 694585092651916603113772411758

Offset: 1

Author

Benoit Cloitre, Feb 16 2003

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..227

Crossrefs

Cf. A026375.

Programs

Mathematica

f[0] = 1; f[1] = 3;  f[n_] := f[n] = (3*(2*n - 1) * f[n-1] - 5*(n-1) * f[n-2]) / n; Table[(f[p]-3)/(2*p), {p, Prime[Range[15]]}] (* Amiram Eldar, Apr 20 2025 *)