23975

Appears in sequences

• a(n) = Sum_{i=0..n} T(i,n-i), array T as in A049735.at n=22A049736
• Number of partitions of n having no doubletons. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] of 18 has two doubletons, shown between parentheses).at n=43A116645
• a(n) = 74*n^2 - 1.at n=17A158744
• Smallest odd number greater than any previous term such that it divides the concatenation of all the previous terms and itself; begin with 1.at n=14A228806
• Triangle read by rows, T(n,k) = Sum_{j=0..n} C(n,j)*L(j,k), L the unsigned Lah numbers A271703, for n>=0 and 0<=k<=n.at n=31A271705