A070828 Sum of prime factors of Catalan numbers A000108(n), n>=2, with n=0 and n=1 terms added.

1, 1, 2, 5, 9, 12, 18, 27, 31, 43, 53, 58, 70, 73, 76, 99, 115, 123, 118, 148, 156, 186, 208, 212, 251, 252, 265, 309, 298, 312, 342, 395, 396, 397, 454, 472, 508, 562, 561, 570, 610, 612, 654, 663, 686, 752, 727

Offset

0,3

Comments

a(0) := 1=: a(2) for A000108(0)= 1 = A000108(1). Sometimes a(0)= 0 =a(1) is chosen instead.

Links

Table of n, a(n) for n=0..46.

Crossrefs

Cf. A001414 (for natural numbers), A064725 (for Fibonacci), A070827 (for Lucas).

Sequence in context: A034307 A382162 A239876 * A112988 A218706 A373662

Adjacent sequences: A070825 A070826 A070827 * A070829 A070830 A070831

Keyword

nonn,easy

Author

Wolfdieter Lang, May 10 2002

Status

approved