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A070828
Sum of prime factors of Catalan numbers A000108(n), n>=2, with n=0 and n=1 terms added.
0
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.
CROSSREFS
Cf. A001414 (for natural numbers), A064725 (for Fibonacci), A070827 (for Lucas).
Sequence in context: A226822 A034307 A239876 * A112988 A218706 A373662
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, May 10, 2002
STATUS
approved