A260895 Number of primes in n-th row of triangle A077664.

1, 2, 2, 3, 2, 6, 2, 5, 4, 7, 4, 10, 3, 8, 8, 9, 4, 13, 4, 11, 8, 11, 6, 15, 7, 13, 10, 15, 7, 24, 7, 13, 12, 16, 12, 23, 9, 18, 14, 22, 10, 29, 9, 20, 17, 20, 9, 28, 12, 25, 17, 23, 12, 31, 15, 26, 18, 24, 13, 44, 12, 24, 21, 25, 18, 43, 13, 28, 21, 39, 14

Offset

1,2

Comments

a(n) = sum(A010051(A077664(n,k)): k = 1..n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Prog

(Haskell)
a260895 = sum . map a010051' . a077664_row

Crossrefs

Cf. A077664, A010051.

Sequence in context: A068903 A329607 A108499 * A107753 A197929 A326849

Adjacent sequences: A260892 A260893 A260894 * A260896 A260897 A260898

Keyword

nonn

Author

Reinhard Zumkeller, Aug 03 2015

Status

approved