1,2

a(n) = SUM[k=1..n] T(n,k) (n >= 1, 1 <= k <= n) = largest permanent of any n X n (0,1) matrix with k 1's in each row and column.

Cf. A133644.

Sequence in context: A149023 A149024 A149025 this_sequence A103942 A030928 A030912

Adjacent sequences: A133219 A133220 A133221 this_sequence A133223 A133224 A133225

more,nonn

Jonathan Vos Post (jvospost3(AT)gmail.com), Dec 19 2007