30788

Appears in sequences

• a(n) = (9*n+1)*(9*n+8).at n=19A001534
• Numbers k such that sigma(k+2) = sigma(k).at n=34A007373
• a(n) = prime(n)*prime(n+1) - prime(n+1).at n=39A037167
• Triangle read by rows: T(n,k) is the number of isomorphism classes of commutative semigroups of order n with k idempotents.at n=29A058116
• First of two sequences bisecting the second differences of the partition numbers (see A053445).at n=31A160644
• Number of partitions p of n such that the number of parts is not a part and max(p) - min(p) is not a part.at n=41A241385
• Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=22A259003