A028302 a(n) = prime(n)*Catalan(n).

2, 6, 25, 98, 462, 1716, 7293, 27170, 111826, 487084, 1822366, 7696444, 30458900, 115000920, 455657715, 1873956510, 7649042610, 29135960700, 118406633730, 466052549820, 1786037492460, 7227122527560, 28473947932950

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..1000

Formula

a(n) = A000040(n)*A000108(n).

Mathematica

Table[Prime[n]CatalanNumber[n], {n, 30}] (* Harvey P. Dale, Jul 22 2016 *)

Prog

(Magma) [NthPrime(n)*Catalan(n): n in [1..40]]; // G. C. Greubel, Jan 04 2024
(SageMath) [nth_prime(n)*catalan_number(n) for n in range(1, 41)] # G. C. Greubel, Jan 04 2024

Crossrefs

Cf. A000040, A000108.

Sequence in context: A027104 A019048 A289604 * A064811 A074418 A330637

Adjacent sequences: A028299 A028300 A028301 * A028303 A028304 A028305

Keyword

nonn,easy

Author

fink(AT)cadvision.com (A.R.FINK)

Extensions

More terms from James A. Sellers

Status

approved